alternative medicine american society of pharmacognosy botany cites chemistry china chinese language david winston drug dutch language english language ephedrine ethnobotany ethnopharmacology ethnopharmacy flexner report german language gnosis greek language hypericin invasive species japanese language knowledge korean language kudzu marine biology marker medical anthropology medicine mencius michael tierra microbiology natural product drug discovery persian language pharmaceutics pharmacology pharmacy pharmacy practice physostigmine phytochemistry phytotherapy pilocarpine quinine rhinoceros seahorses standardization tubocurarine