3,4-dihydroxypyridine

The main use of dimercaptosuccinic acid is for detoxification. In the medical system, it can solve the harm of various poisons, such as lead, mercury, arsenic and other heavy metals.
Although the concept of "Tiangong Kaiwu" does not describe this substance in detail, in the field of medicine and pharmacology, dimercaptosuccinic acid is quite useful. It can combine with heavy metal ions to form a stable and soluble complex, which can be excreted in urine to achieve detoxification effect.
In the case of lead poisoning, if the human body is disturbed by lead poisoning, qi and blood are in violation, and viscera are affected. Dimercaptosuccinic acid can enter the human body, seek lead ions and combine them, reduce its toxicity, lead it out of the body, and make the human body gradually return to health. The same is true for mercury toxicity. Mercury is severe, hurting the mind and damaging the brain. Dimercaptosuccinic acid can fight with mercury, relieve its poison, and protect people's body and mind.
And in the disease of arsenic poisoning, arsenic poison erodes, or causes skin ulceration and viscera decay. Dimercaptosuccinic acid can exert its detoxification ability, combine with arsenic ions, remove its poison, and give patients a chance to recover. Therefore, dimercaptosuccinic acid has a significant effect on detoxification and is a good medicine for doctors to detoxify and treat diseases.

The synthesis method of Erhongji Wangqi, although the ancient book "Tiangong Kaiwu" does not directly mention this specific thing, it can be inferred from a similar process.
In the ancient metallurgical casting technique, the fusion of many metals requires fine heat and proportions of ingredients. To synthesize Erhongji Wangqi, it may be necessary to clarify the characteristics of each composition. If it is a metal composite, it can be analogous to the ancient method of smelting alloys. For example, when making bronze, copper and tin are melted in a certain proportion. First, the copper material is placed in a crucible, burned with charcoal fire until the melting point, and when the copper liquid is rolled, the tin material is slowly added, and the long rod is stirred in the meantime to make the two fully blend. This stirring work makes the composition uniform and the alloy has a good texture. To synthesize Dihongji Wangqi, you may also need to control the temperature and stirring rhythm in this way.
Another example is the ancient alchemy, where warlocks mix and refine various minerals and herbs in order to seek longevity elixirs. They control the temperature very delicately. When to burn fiercely and when to simmer slowly, there is a fixed number. If the synthesis of Dihongji Wangqi involves minerals and other raw materials, you can participate in this. First grind the required minerals into powder, place them in an alchemy furnace in a specific order, force out the mineral impurities at the beginning, and then turn to the heat to promote their compound reaction. And alchemy often uses a specific container, or the container for synthesizing Dihongji Wangqi also pays attention to, such as the material needs to be resistant to high temperature and does not react with raw materials.
Looking at the ancient brewing process, when brewing wine, the timing of wine koji and the temperature and humidity of the fermentation environment are all related to the quality of the wine. To synthesize Erhongji Wangqi, if there is a similar fermentation process, it is necessary to choose a clean, temperature and humidity controllable place. After the raw materials are mixed, they may need to be sealed and left to stand, and the internal reaction will be observed regularly during the period, and the conditions will be fine-tuned according to the reaction conditions, so that the synthesis method of Erhongji Wangqi can be obtained.

Difluorocarbine is a miraculous active intermediate in organic chemistry. Its physical and chemical properties are unique and have a profound impact on the process and product structure of many organic reactions.
Difluorocarbine has high reactivity. Because the outer electron of the carbon atom is only hexagonal, it is very necessary to obtain electrons to achieve the stable structure of the octet. It is like a thirsty person looking for someone to share electrons with. This property makes it easy to react with molecules containing unsaturated bonds, such as olefins, alkynes, etc., like a passionate person eager to cooperate with others.
Its electronic structure is special, and the difluoro group has strong electron absorption, which reduces the density of the electron cloud of the central carbon atom and makes it more electron-deficient. The difference in the distribution of this electron cloud makes its selectivity in the reaction unique, just like a wise man's discerning eyes when making a choice.
Difluorocarbine has a low boiling point and is mostly gaseous at room temperature and pressure, which is convenient for it to perform in gas-phase reactions and also facilitates its participation in various reactions. It is like a light bird that can travel freely in different reaction environments. And its solubility is good in common organic solvents, laying the foundation for the development of solution-phase reactions, as if building a broad stage for it.
In addition, the reactivity of difluorocarbine can be regulated by adjusting the reaction conditions, such as temperature, solvent, catalyst, etc. The appropriate reaction conditions can make it dance on the stage of chemical reactions like a trained dancer, accurately achieving the synthesis of the target product. In short, difluorocarbine shines brightly in the field of organic synthesis with its unique physical and chemical properties, providing chemists with a powerful tool for constructing novel organic molecular structures.

In today's world-looking city, the price of two baht is very difficult to determine. The range of its price is related to many ends. The ancient coins, materials, appearance, age, and number of surviving are all the main reasons.
If the two baht coins are in good condition, exquisite craftsmanship, old and rare in the world, their price will be high. It may reach thousands of gold, or even thousands of gold. Collectors compete for such good products, and the price will skyrocket.
However, if there is a shortage of quality, ordinary craftsmanship, and there are many surviving ones, the price will be cheap. Or only worth a few gold, or just tens of gold.
In addition, the supply and demand of the city is also the key. If all collectors like two baht coins, the price will be high; on the contrary, if the supply exceeds the demand, the price will drop.
Therefore, the price of two baht coins in the market probably ranges from a few gold to ten thousand gold. It is difficult to determine the range of its price. It is necessary to carefully observe the various characteristics of the coin and observe the supply and demand of the market to know its approximation.

3,4-Difluorobenzonitrile is used in many fields such as medicine, pesticides, electronic materials, etc.
In the field of medicine, it is a key intermediate for the synthesis of various drugs. For example, in the preparation of some anti-tumor drugs, 3,4-difluorobenzonitrile participates in the reaction. After a series of chemical transformations, it can construct molecular structures with specific pharmacological activities, helping the drug to inhibit the proliferation of tumor cells. In the development of neurological drugs, it is used as a starting material. Through ingenious organic synthesis steps, key fluorine atoms and nitrile groups can be introduced to optimize the binding ability of the drug and the target, improve the efficacy of the drug, and enhance the therapeutic effect of the drug on neurological diseases.
The field of pesticides is also an important place for 3,4-difluorobenzonitrile. With its unique chemical structure and electronic properties, it can be used to create high-efficiency, low-toxicity and environmentally friendly pesticides. For example, the synthesis of new insecticides, based on 3,4-difluorobenzonitrile, through rational molecular design and modification, synthesizes compounds with high selective poisoning effect on pests, effectively control crop pests, while reducing the negative impact on non-target organisms and the environment, contributing to the protection of agricultural safety production and the development of green agriculture.
In the field of electronic materials, 3,4-difluorobenzonitrile is also indispensable. With the rapid development of the electronics industry, the demand for high-performance electronic materials is increasing. This compound can be used as a raw material for the synthesis of special functional materials, such as for the preparation of liquid crystal materials. After careful preparation and synthesis processes, the liquid crystal materials are endowed with better electrical and optical properties, enabling the liquid crystal display to exhibit a higher-definition and more stable display effect. To meet people's growing demand for the display quality of electronic products.