Vitamin K2 is a series of terpene side-chain compounds containing 2-methyl-1, 4-terpene nuclei and C3-bits with varying numbers of isoprene structural units, according to the number of carbon elements on the terpene side chain, can be divided into K2 (10), K2 (20), K2 (35), K2 (40) and so on. Vitamin K2 (35) is vitamin K2 with 35 carbon elements on the side chain of terpene, and vitamin K2 (35) is also known as methylphenidate-7.
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