对叶马钱[Strychnos decussata (Pappe)Gilg]是一种小乔木或灌木。在筛选中发现其根皮和茎皮中的生物碱具有强的肌肉松驰作用;尤以氯仿提取部分为明显。作者等取粉碎的茎皮5kg,在室温中两次用醋酸搅拌过夜。滤液用5％盐酸调至 pH2,加 Mayer氏试剂至沉淀完全。滤取沉淀物溶解于醋酸-甲醇-水 Strychnos decussata (Pappe) Gilg is a small tree or shrub. Found in the screening of the root bark and bark of the alkaloids have a strong muscle relaxation; especially chloroform extract part is obvious. The author took crushed stem bark 5kg, stirred twice with acetic acid at room temperature overnight. The filtrate was adjusted to pH 2 with 5% hydrochloric acid and Mayer’s reagent was added until the precipitate was complete. The precipitate was filtered off and dissolved in acetic acid-methanol-water