5-Bromo-6-chloropyridine-2-carbaldehyde

He who is in the armour of a man should not be afraid. His armor is as hard as a golden stone, and there are many lights, to protect against the shield, and to be able to invade from the outside. When encountering a stern, he often puts his limbs into the stern, if the rock is safe, so that the stern can be broken.
The shape of the armour is many, but its nature is also common. His walking is also strong, his body is not big, and his feet are heavy. The wings are hidden under the armour, waiting to be spread, the buzzing is powerful, and he can travel in the air for a short distance. However, due to the weight of the armour, it is not very difficult.
There are scavengers, who shuttle through the rotten wood, and use rotting objects to help the flow of nature, and transform decay and magic; there are plant-eaters, who eat from plants and plants, or who are in trouble with forests, but they also produce one kind of food; there are also carnivores, who use small animals, sensitive and healthy limbs, to catch grass and wood.
Its reproduction, the female is the place where the egg is hidden, and the heart is cut, and the egg is often kept in the hole. Eggs turn into larvae, and the shape of the larvae is formed, and the skin is formed, and the appearance of the skin is formed. There are short, short months, and years in the life of a child, all depending on the environment. Therefore, in nature, A is tiny and indispensable, and with its unique nature, it acts as a wonder of life.

The synthesis method of 5-hydroxy- 6-bromoindole-2-carboxylic acid is not directly recorded in Tiangong Kaiwu, but the ancients also had a lot of wisdom in organic synthetic chemistry, which can be used for reference.
Considering ancient methods, organic synthesis often depends on the transformation of natural materials. To obtain this compound, you can start from natural plants rich in indole structures. For example, some special herbs may contain similar skeletal components in their bodies. The relevant crude products can be extracted from plants by water extraction, wine extract, etc.
After extraction, they need to be purified. In ancient methods, recrystallization was commonly used, which was crystallized multiple times with different solvents to remove impurities and obtain purer indole-containing raw materials. < Br >
After obtaining the indole-containing raw materials, Kesi introduced bromine and hydroxyl and carboxyl groups. In ancient times, although there were no advanced halogenation reagents today, it was possible to borrow potassium halide, sodium halide, etc., accompanied by a specific catalyst, or under the conditions of light and heating, to try the bromination reaction. As for the introduction of hydroxyl and carboxyl groups, we can learn from the ancient oxidation process. Using natural oxidants, such as some metal oxides, or natural oxidation in air, try to make indole form hydroxyl and carboxyl groups at specific positions.
The process of synthesis also requires attention to the control of reaction conditions. Temperature, time, and material ratio are all key. Although the ancients did not have precise instruments, they could use experience to control the temperature with heat, measure the time with missing points, and repeatedly try to find the best synthesis method.
Although the ancient synthesis of 5-hydroxy- 6-bromoindole-2-carboxylic acid may be difficult and complicated, the exploration spirit and practical wisdom of the ancients can provide different ideas for today's research and have far-reaching significance for the development of organic synthetic chemistry.

The five rocks are scattered, and the six are withdrawn, both of which are strange things. As for the armor crab, its main uses are quite extensive.
The armor crab is quite helpful in the matter of farming and mulberry. Its shell is hard and can be made into parts of agricultural tools, which can help farmers manually translate the soil to reclaim the field, making the land softer, which is conducive to seed sowing and crop rooting. During irrigation, the shell of the armor crab can assist in diverting water flow, making the farmland moist everywhere.
In times of war and strife, the armor crab is also used for extraordinary purposes. Its shell can be made into simple protective gear, although it is not like fine iron armor, but in an emergency, it can resist some swords, guns and arrows for soldiers, and save their lives in a moment. And the claws of the crab are strong and powerful. If trained, it can make the crab clamp the feet of the enemy horses before the battle formation, disturb the enemy's army formation, and create fighter jets for itself.
In daily life, the nail crab is also indispensable. Its meat is delicious, and it can be used as a delicacy to add a delicious taste to the table of the common people. And its shell has been crafted by craftsmen, and can be turned into exquisite jewelry, or an embellishment on a woman's bun, or something for children to play with, adding interest to life.
In addition, the nail crab is also effective in medicine. Its shell is ground into powder, processed, and can be used as medicine. It has the effect of removing blood stasis and swelling for bruises, blood stasis, swelling and pain, and is a good prescription for doctors to treat diseases and save people.
Nail crab plays an important role in agriculture, warfare, life, medicine and many other aspects, and is actually a useful thing in heaven and earth.

In today's world, business conditions are ever-changing, and the price of a market change also varies from time to time, place to place, and situation to situation. It is difficult to judge the price of a crab in the market.
The price of a crab in the city depends primarily on supply and demand. If the production of a crab is abundant, but there are few people who want it, the price will be lower; if its production is scarce, and everyone is competing for it, the price will be higher. If the time is right, the nail crab is plump, and there are many catchers, and the city is full, its price will be easy and easy; if it is not worth it, the nail crab will be hard to find, although it is not easy to get.
The second time is about quality. The size, fat, and freshness of a crab are all trade-offs of price. The big ones, the fat ones, the fresh ones, the price must be higher than the small ones, the thin ones, and the freshness is not as good. Such as the nail crabs with plump plump and full shells and tender red meat, they are the top choice, and their price is high; while those with thin barren shells and less fresh air must be slightly lower.
Furthermore, the difference in region also affects. In the origin of the nail crab, the price may be cheaper than elsewhere due to the convenience of taking it; while in distant places, the price increases due to the labor of transshipment and the cost of preservation. And the fashion and taste of different regions are different, and the demand for the nail crab is also different, which is all related to the price.
There are factors such as market competition and operating costs. In order to sell quickly, there may be price reductions; and the cost of operating rent, manpower, taxes, etc. must also be included in the price. If the cost is high, the price is difficult to suppress; if the cost is low, it may be profitable.
Therefore, if you want to know the price of the crab market, you must comprehensively investigate it, and carefully examine the time, place, quality, and other factors before you can get a rough idea. It is difficult to be certain.

A shark is also a spiritual object of the aquarium. It is necessary to be careful about all matters during storage and transportation.
When storing, the first thing to pay attention to is the environment where it lives. A shark likes cold and evil heat, so it is advisable to keep it in a cool place and keep it moist. If it is in a hot and dry place, its armor is easy to crack, its meat is easy to dry, and its life will not be long. And where it is stored, the water quality should be clear, and there should be no filth and sundries to disturb it. If the water quality is turbid and turbid, a shark is easy to dye, its color gradually darkens, and its vitality gradually loses.
Furthermore, there is also attention to the storage device. Do not use sharp tools to prevent damage to its body. When it is filled with a soft vessel, such as a basket made of cattail grass, or a wooden groove, lined with a soft cloth, it can protect its integrity.
As for the way of transportation, the speed should be steady and slow. The sharks are cowardly by nature. If the speed is too fierce and the bumps are too excessive, their hearts will be easily shocked, and their qi and blood will be easily confused, which may cause casualties. And when transporting, it is necessary to constantly observe their appearance. If you see a sharks in a depressed state, or a different color of the sharks, you should quickly check the cause, or adjust the water quality, or slow down their speed.
Oxygen supply on the way is also necessary. The sharks depend on water and oxygen to live, and if they lack oxygen, their breathing will be difficult to continue. Therefore, it is necessary to prepare delicate tools to keep oxygen in the water. Aquatic plants can be placed in the transportation device, and with their photosynthetic power, oxygen can be generated in the water.
Also, during transportation, do not mix with other things. The sharks are unique in nature, coexist with other things, easy to fight, and fear the disease of other things.
To store and transport the sharks, you need to check their nature, follow their habits, and be careful.