pyridine, 2-bromo-5-iodo-3-methyl-

This compound is called "ambergris".
Ambergris is an extremely rare spice and medicinal material. Its formation is quite peculiar. After the sperm whale swallows large squid, octopus and other prey, it cannot digest the horny jaws, tongue and teeth, etc., which have undergone a series of complex biochemical reactions and years of precipitation in the intestines.
Looking at its shape, it is light black at first, but under the erosion of seawater, sunlight and oxidation of the air, it gradually changes color and eventually becomes white, and the texture also changes from soft to hard. White is of the best quality and is worth thousands of dollars.
Its aroma is unique, rich and distant, containing not only the fresh smell of the ocean, but also the fragrance of grass and trees, and the mellow fragrance of animals. In the field of fragrances, ambergris's status is extremely respected, which can add a different flavor to fragrances and make them last for a long time. Therefore, many top perfumes are proud to be able to add ambergris.
From a medical perspective, ambergris has the functions of promoting qi and promoting blood circulation, dispersing knots and relieving pain, and promoting water and dripping. Ancient physicians often used it to treat cough, asthma, and abdominal pain.
Ambergris is rare in the world, often drifting on the sea surface or rushing to the coast. Because of its rare source and extraordinary effect, it has been cherished since ancient times and can be called a treasure in the sea. It plays a pivotal role in both the fragrance and medicine industries.

This compound has many physical properties. Its color state is often crystal clear, just like the dew rolling on the lotus leaf in the morning, pure and agile, or a colorless and transparent liquid, flowing like a agile elf; or a crystal as white as snow, with a delicate texture, like a carefully carved jade.
Looking at its smell, part of it exudes a light fragrance, just like a flower blooming in spring, fresh and pleasant, which is refreshing and refreshing; however, there are also those who emit a pungent smell, which smells like a sharp blade has cut their nose, and they feel uncomfortable.
When it comes to solubility, the performance in water varies. Some compounds are like fish entering water, easily soluble, and fuse with water to form a uniform and stable solution; while some are like oil and water, incompatible with each other, and form a single body in water, clearly distinguishable.
In terms of density, it may be lighter than water, just like a feather floating on water, light and comfortable; or heavier than water, it will sink like a stone in the sea when thrown into the water, and quickly sink.
As for the melting point and boiling point, there are also differences. Some compounds have very low melting points, and will melt like ice and snow in case of a little heat, turning into a liquid; while the boiling point may be high or low, some need to be roasted for a long time before boiling, and some need to be heated slightly to evaporate water vapor. < Br >
And its conductivity also varies, some are like unobstructed roads, which can conduct electricity well, and there is no obstruction when the current passes; some are like open circuits, which are almost non-conductive and difficult for the current to pass through. These are all important physical properties of this compound.

This compound has a wide range of applications in organic synthesis, and its outline can be seen by studying "Tiangong Kaiwu" in detail.
"Tiangong Kaiwu" is not described in detail in today's chemical terms, but from the perspective of that time, it also has exquisite insights into the characteristics and uses of many substances. As far as this compound is concerned, one can be used for pigment preparation. Ancient painters often explored the mixture of various substances when seeking pigments with bright colors and durability. The participation of this compound may give pigments a unique color, enhance their stability, and do not fade over time, so it is of great value in the fields of calligraphy and painting, ceramic color decoration, etc.
Second, it also has traces in the fabric dyeing process. If the dyer wants to make the fabric color uniform and firm, he must consider the dyes and additives used in detail. This compound may be used as an additive to better adhere the auxiliary dyes to the fabric fibers, so that the dyeing effect is better, the color is fuller, and it is not easy to be lost due to washing and sun exposure.
Furthermore, it may also be used in the processing process of some traditional medicines. Ancient healers paid attention to the purity and efficacy of the drug when processing the drug. This compound may participate in the refining or modification of specific drugs to help it better exert its pharmacological effects, or improve the shelf life of the drug to ensure the stability of the drug effect.
Although the description in "Tiangong Kaiwu" is not as detailed as it is today, its records leave precious clues for future generations to explore ancient crafts and material applications, allowing us to see the various uses of this compound in the past.

To make this compound, the method is as follows:
First take a clean vessel and place it in a stable place. Prepare all the things you need, and all things must be pure and free of impurities. This is the foundation for making good things.
In the vessel, slowly pour in several specific raw materials according to the appropriate ratio. The proportion is very important. If there is a slight deviation, the properties of the substance may not be as expected. When pouring in, the action should be slow, and it must be stirred constantly, so that the raw materials are evenly mixed and fused.
When stirring, heat it up with a low heat. It is difficult to control the heat, so you must pay careful attention. The fire should not be too vigorous. If it is too vigorous, the raw material will easily boil and splash out, and the properties of the substance may deteriorate; the fire should not be too weak. If it is too weak, the reaction will be slow and time-consuming.
When it reacts in heat, continue to stir to make the reaction sufficient. In this process, closely observe the change of the object, and the change of color and shape should not be ignored. If there is any abnormality, think of countermeasures quickly, or adjust the heat, or change the speed of stirring.
When the reaction is completed, remove the remover from the fire and let it stand in a cool and ventilated place to cool naturally. After cooling, the resulting product is either a solid or a liquid, depending on the characteristics of the compound. If it is a solid, it may need to be crystallized and precipitated by an appropriate method, or filtered and washed to remove impurities; if it is a liquid, it may need to be distilled, separated, etc., to improve its purity.
After these steps, this compound can be obtained. However, every step needs to be done with caution. If you are not careful, all your efforts will be in vain.

This compound is a rare wonder in the world. Its chemical properties are unique and extraordinary, and it contains many wonderful properties.
The first to bear the brunt is its excellent stability. Just like the rock that has stood still after years of wind and rain, under normal circumstances, this compound can maintain its own structure and properties for a long time, and does not easily react with the things around it. It seems to be independent in the complex world, and it is not disturbed by many external factors.
Furthermore, its solubility is also unique. In a specific solvent, it can dissolve quickly, just like ice and snow meet the warm sun, quietly merging into it, forming a uniform and stable system. However, for some other solvents, it is like a hermit who refuses people thousands of miles away, and it is difficult to blend with it. This selectivity for solvents undoubtedly adds to the mystery of its chemical properties.
In addition, the oxidizing and reducing properties of this compound are also worth exploring. Under certain conditions, it can exhibit oxidizing properties, just like the one who controls the power of lightning, can capture the electrons of other substances and cause them to oxidize. In other cases, it is transformed and exhibits reducing properties, just like the generous devotee, giving its own electrons to other substances to help them complete the reduction process.
Its acidity and alkalinity also have unique manifestations. In an acidic environment, it may exhibit some characteristics of counteracting or interacting with it; in an alkaline environment, it will exhibit a different reaction, just like a wise person who can adapt to different environments and flexibly adjust its own state.
Not only that, this compound also has excellent performance in thermal stability. In the high temperature environment, it is like a phoenix born of fire, and it can still maintain its own structure and properties relatively stable, not easily decomposed or deteriorated due to the increase in temperature.
All these chemical properties make this compound have potential application value in many fields, and it is really a dazzling pearl in the chemical world.