1472-62-4Relevant articles and documents
Isolation and preparation of 3H-tetrandrine
Huang,Wang,Lu
, p. 899 - 903 (1994)
Tetrandrine is a biabenzytehahydroisoquinoline alkaloid. Its structure is vary complex and the preparation of labeled derivatives is difficult. We have prepared 3H-tatrandrine using the tritium gas exposure method. This method produces many fragments which make isolation and purification of small quantities difficult. We investigated these fragments of unlabeled d-tetrandrine and found almost all contain one to several hydroxide groups. Using this information, we designed a two-step paper chromatography method for isolation and purification of 3H-Tetrandrine. This method involves the application of a pH 4.7 Na2HPO4-citric acid buffer to the paper to block the migration of hydroxide group fragments of tetrandrine. 3H-tetrandrine was successfully with a radiochemical purity of 90%.
Effect of isoquinoline alkaloids of different structural types on antiplatelet aggregation in vitro
Chia, Yi-Chen,Chang, Fang-Rong,Wu, Chin-Chung,Teng, Che-Ming,Chen, Keh-Shaw,Wu, Yang-Chang
, p. 1238 - 1241 (2007/10/03)
Forty-one isoquinoline alkaloids were tested for antiplatelet aggregation effects. Among them, (-)-discretamine (6), protopine (7), ochotensimine (18), O-methylarmepavinemethine (23), lindoldhamine (25), isotetrandrine (26), thalicarpine (27), papaverine (28), and D-(+)-N-norarmepavine (32) exhibited significant inhibitory activity towards adenosine 5′-diphosphate (ADP)-, arachidonic acid (AA)-, collagen-, and/or platelet-activating factor (PAF)-induced platelet aggregation. The results are discussed on the basis of structure-activity relationships. Georg Thieme Verlag KG Stuttgart.
Alkaloids of Cryptocarya longifolia: X-ray Crystal Structure of Thalifoline and Longifolonine
Bick, I. Ralph C.,Sevenet, Thierry,Sinchai, Wannee,Skelton, Brian W.,White, Allan H.
, p. 195 - 207 (2007/10/02)
The known alkaloids reticuline (1), coclaurine (3), N-methylcoclaurine (2), laurotetanine (7), N-methyllaurotetanine (8), laurolitsine (10), isoboldine (9), norisocorydine (6), norargemonine (11), bisnorargemonine (12), thalifoline (16) and scoulerine (13) were isolated from the New Caledonian plant Cryptocarya longifolia together with two new bases, longifolidine (4) and longifolonine (14).Spectroscopic methods were used for identification and structural investigation, and X-ray crystallographic analysis to determine the structures of thialifoline and longifolonine