Pyrrole-3-carboxylic acid, 2,4,5-trimethyl-, ethyl ester

Because I don't know the specific information of the item, the following is an example of "Sinan", modeled on the classical Chinese style of "Tiangong Kaiwu" to answer.
Fu Sinan is an ancient navigational tool. Its shape is like a spoon, the bottom is round and smooth, and it is placed on a smooth copper plate. The plate surface is engraved with signs of dry branches, gossip and indexing, which are different from the four directions.
The system of Sinan is made of a magnet, which is carved in the shape of a spoon, and its magnet is taken to have the nature of a guide for iron. Magnets, the spiritual objects of heaven and earth, contain the essence of yin and yang, so they can be oriented in the north and south direction. The craftsman carefully carved, so that the handle of the spoon-shaped Sinan, which always refers to the south pole, although it has been tossed and turned, does not change
In the past, the boat traveled in the vast sea, and the road was filled with small mountains and rivers. Sinan's contributions were particularly great. Business travelers rely on it to communicate with and without, and travelers rely on it to know the direction, so as not to get lost in the way. He is indispensable in sailing and traveling far.
Sinan's invention shows the ancient wisdom, insight into the physics of heaven and earth, ingenuity, and craftsmanship to make this artifact. Make it convenient for future generations to enjoy it, and to explore the world and expand the way of the territory.

The substance is widely used and has important applications in many fields.
In war, it is often a weapon for defeating the enemy. Or it can be made into a powerful crossbow, with a long range and great power. It can cause a heavy blow to the enemy on the battlefield, making the enemy afraid, disrupting their positions, and creating favorable fighter jets for their own side. Or it can be made into sharp blades, such as swords and halberds. In close combat, with its excellent texture, it can easily penetrate the enemy's armor, kill the enemy in an instant, and help the army gain an advantage in war.
It is also indispensable in labor production. Can be made into all kinds of agricultural tools, such as ploughshares, with its tough characteristics, can deeply cultivate the land, greatly improve farming efficiency, so that the land can be better reclaimed and cultivated, and lay the foundation for the harvest of grain; also like the sickle, during the harvest season, it can quickly cut the grain, help the smooth progress of farming, and ensure the timely return of grain.
In daily life, its use is also extremely extensive. It can be made into exquisite utensils, such as tripods, pots, etc., or used for cooking food to make food more delicious; or used to hold drinks and drinks to add elegance to life. It can also be made into various accessories, such as hairpins and jade pendants, decorated on the body, showing the elegant temperament and status of the wearer.
When building construction, its role should not be underestimated. It can be made into strong nails and riveting, making the building structure more stable and not collapsing after wind and rain; it can also be made into exquisite door and window accessories to ensure smooth opening and closing of doors and windows, and has the function of anti-theft, creating a safe and comfortable living environment for people. In short, this substance plays a pivotal role in military, production, life, construction and many other aspects, and is of great significance to the development and progress of society.

This substance has a variety of physical properties. Its color is crystal clear, just like the ice and snow of ice and jade. Under the sunlight, it refracts a bright light, which catches the eye. Its quality is abnormally hard, like an indestructible rock. If you hit it with ordinary utensils, it is difficult to leave traces. And its nature is brittle, and if it is slightly stressed, it is easy to crack and break, turning into several pieces.
Furthermore, this substance has a moderate density and is placed in the palm of your hand. It feels sinking, but it is not heavy. Its thermal conductivity is quite good. If it is burned with fire, the heat will be quickly transferred, and the whole body will be warm in a moment. Its conductivity is almost non-existent, so it is connected to the circuit, and it is difficult for current to pass through, like an insulating barrier.
At the same time, the surface of this substance is as smooth as a mirror. When touched, it is delicate and warm, and there is no feeling of roughness and stagnation. Its transparency is very high, and it can be clearly seen through this object, with few obstacles, just like clear water, unobstructed at a glance. And its ductility is almost non-existent, and it is extremely difficult to stretch and extend it. With a little force, it will break.
Looking at its solubility, it is extremely difficult to dissolve in common water. Although it has been left in water for a long time, it is difficult to see its body loss, as if it is incompatible with water. These many physical properties together constitute the unique characteristics of this substance, making it unique among various substances.

The chemical properties of this substance are the characteristics of the substance in chemical changes. Although "Tiangong Kaiwu" is not described in detail in today's chemical terms, according to the process described, a summary of the chemical properties of the substance can be deduced.
For example, the book talks about hardware smelting. Taking iron as an example, iron ore is smelted into iron. In this process, iron ore (often iron oxide, etc.) reacts with reducing agents such as carbon, and iron changes from a compound state to a free state, showing that its oxides can be reduced. And iron is prone to rust. In humid air, iron reacts with water and oxygen to form rust (mainly iron oxide hydrate), which shows the chemical properties of iron that are easily oxidized.
Another look at copper. Copper can be cast, its chemical properties are relatively stable, and it reacts slowly with many substances at room temperature. However, when heated, copper and oxygen combine to produce copper oxide, and the color changes. This shows the nature of copper heating energy reacting with oxygen. And copper can replace metals in other metal salt solutions under specific conditions, such as copper and silver nitrate solutions. Silver precipitation on the surface of copper, because copper metal is more active than silver, this is also an important chemical property of copper.
When it comes to sulfur, it is very useful in the preparation of gunpowder. Sulfur is flammable and reacts violently with air oxygen to produce sulfur dioxide. In gunpowder, sulfur is combined with saltpeter and charcoal to ignite a complex redox reaction, releasing a lot of heat and gas, causing explosion. This highlights the chemical properties of sulfur that are flammable and play an important role in redox reactions.
Salts are also substances often covered in books. Salts are mostly soluble in water, and some salt solutions can react with each other. For example, salt is extracted from brine, using the properties of salt solubility changing with temperature and other conditions. Salts often react chemically with metals, acids, bases, etc., showing various chemical properties.
In summary, although "Tiangong Kaiwu" does not accurately describe chemical properties in modern science, it is remembered that behind the process practice, hidden substances are rich in chemical properties, leaving precious data for future generations to explore the evolution of ancient chemical and material properties.

To make this thing, there are many methods.
First, you can borrow natural things to refine it. Find its related raw materials, among mountains, rivers and forests, there are natural reserves. After harvesting, it is tempered many times. First calcined with fire to remove its impurities, so that the texture is pure. The fire is raging, like the scorching summer sun, the raw materials are placed in a special furnace, and the heat is controlled. It may be fierce or soft, depending on the characteristics of the raw materials. When calcined, impurities gradually emerge, such as dripping beads rolling down, discarding them. When the impurities are exhausted, then quenched with cold water to make it suddenly cold, the texture is firm and tough, like cold iron through frost. This is the key to refining with natural raw materials in ancient methods.
Second, it is formed by the method of synthesis. Choose several other things and match them in precise proportions. Mix all things together, like soldiers in an array, each in its own place. Place in a special weapon, or kettle or cauldron. Apply medicinal power to stimulate a reaction. The medicinal power is like the strategy of a counselor, guiding all things to combine. During this time, there may be strange images, such as smoke rising and flickering brilliance. After the reaction is completed, take the obtained things, add carving and polishing. When carving, the craftsman carries a knife like a pen, and according to the shape of the object, give it a charm, so that the finished product fits the needs, exquisite and applicable.
Third, with the help of fairy magic (if this exists). Set up an altar in a spiritual place and use a spiritual talisman incantation as a guide. Place related things on the altar and infuse it with spiritual power. Spiritual power is dense, like a spring breeze turning into rain, moisturizing all things. The mantra is loud, like the sound of the sky lingering, triggering the spiritual energy of heaven and earth to help. When spiritual power and things are integrated, extraordinary products can be obtained. However, this method needs to be practiced by profound people, and spiritual places are hard to find. Spiritual talisman incantations are not known to ordinary people, and are extremely rare.
The method of making this thing has its own subtlety. According to different situations and needs, choose the good and follow it.