The British Pharmacopoeia (BP) is the national pharmacopoeia of the United Kingdom. Pharmacopoeia standards for medicinal oils should be heeded. Yellow dock is part of the homeopathic pharmacopoeia. Pharmaceutical products can usually be tested and qualified by various Pharmacopoeia. The main products were tincture and other similar drugs listed in the Japanese Pharmacopoeia. The European Pharmacopoeia lists more than 200 hydrochlorides as active ingredients in medications. According to the European pharmacopoeia, HPLC is used in only 15.5% of syntheses. The solubility classification is based on a United States Pharmacopoeia (USP) aperture. With Song, Cheng received instruction and became conversant with the Chinese pharmacopoeia. At least 7,000 medical compounds in the modern pharmacopoeia are derived from plants. The following list represents a very small portion of the TCM pharmacopoeia. However, it plays a role in 44% of syntheses in the United States pharmacopoeia. The British Approved Name and European Pharmacopoeia term for this drug is hence "adrenaline". A number of early pharmacopoeia books were written by Persian and Arab physicians. Several legal texts make the "European Pharmacopoeia" mandatory in Europe.