7 rezultatus
From the stem bark of STRYCHNOS SPINOSA two tertiary alkaloids were isolated. By means of their spectral data they were identified as 11-methoxy-diaboline and 12-hy-droxy-11-methoxy-diaboline.
From the leaves of Strychnos pseudoquina (Loganiaceae), isorhamnetin (1) and a new biflavone (2) named strychnobiflavone were isolated together with the alkaloids diaboline and 11-methoxydiaboline.
The isolation of one of the major alkaloids and 11 minor alkaloids from the stem bark of Strychnos dolichothyrsa is described. The major alkaloid was identified as bisnor-C-alkaloid H. Two new dimeric alkaloids derived from this alkaloid were found, dolichocurine and dolichothine. For the former
Akagerine (3) was isolated from three different species of South American Strychnos: from S. gardneri A. D.C. (Rio de Janeiro, Brazil), together with 11-methoxydiaboline (2); from S. jobertiana Baillon (Brazil), together with diaboline (1): and from S. parvifolia D.C. (Bahia, Brazil).