Chemical investigation of the endophytic fungus, KL-1.1, isolated from the leaves of Psidium guajava (Linn)
led to the isolation of two new cytochalasin derivatives, 18-desoxy-19,20-epoxycytochalasin C and 18-
desoxycytochalasin C, together with five other known derivatives. The structures of the isolated
compounds were elucidated by one and two dimensional nuclear magnetic resonance spectroscopy as
well as by mass spectrometry. These compounds represent novel chemical scaffold with potential for
development into anticancer agents