Enicostemins A and B, New Secoiridoids from Enicostemma verticillatum
نویسندگان
چکیده
The genus Enicostemma belonging to the family Gentianaceae comprises four species [1, 2]. One of these is Enicostemma verticillatum, which is widely distributed in South America, Africa, and Asia [1]. In Pakistan, it is mainly found in Thatta, Badin, Hyderabad, Mirpur, Gharo, and Manghopir [1]. E. verticillatum is a bitter tonic and is used as a substitute for chirayita as a blood purifier. The literature survey revealed that only a flavone C-glucoside has so far been reported from this species [3]. Herein, we report the isolation and structure elucidation of two new secoiridoids named as enicostemins A (1) and B (2) (Fig. 1) along with gentiocrucine (3) [4] and rutin (4) [5], which have been isolated for the first time from this species.
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