Ragasa C Y, Cruz M C, Gula R, Rideout J A
Chemistry Department, De La Salle University, Manila, Philippines.
J Nat Prod. 2000 Apr;63(4):509-11. doi: 10.1021/np9902946.
Two new diterpenes (1 and 2) were obtained from the leaves of Tinospora rumphii, along with the known compounds tinotufolin D and vitexilactone. The structures of compounds 1 and 2 were established on the basis of spectroscopic studies.