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痛可宁(L-Dicentrinum)为防已科植物红藤山乌龟(Stephania brachyandra Dieis)块根提取物,其有效成份为左旋荷包牡丹碱(C_(20) H_(21) O_(34) N=339.39)。痛可宁为白色或微黄色针状或棒状结晶,无溴,无味,遇光或受热渐变黄色。氯仿中易溶,丙酮可溶解,略溶于乙醇,不溶于水中。熔点168—171℃。本品有镇痛、镇静作用。临床上用于头痛、牙痛及小手术后疼痛,神衰等。成品为片剂,(20mg/片)。
L-Dicentrinum is the root tuberous extract of Stephania brachyandra Dieis, which is the dominant plant belonging to the genus Corynebacterium tumefaciens. Its active ingredient is levobupivacaine (C_ (20) H_ (21) O_ (34) N = 339.39) . Pain may rather white or yellowish needle-like or rod-shaped crystals, no bromine, tasteless, in case of light or heat gradient yellow. Chloroform soluble, acetone soluble, slightly soluble in ethanol, insoluble in water. Melting point 168-171 ° C. This product has analgesic, sedative effect. Clinically for headache, toothache and minor surgery pain, Shen Su and so on. The finished product is a tablet, (20 mg / tablet).