Studies on the Constituents of the Leaves of Tinospora tuberculata, I. – Isolation and Structure Elucidation of two New Furanoid Diterpenes, Tinotufolin A and B

Two new furanoid diterpenes, tinotufolin A (1) and B (2) were isolated from the fresh leaves of Tinospora tuberculata Beumee (Menispermaceae). The structures of 1 and 2 were elucidated on the basis of chemical and spectroscopic findings.