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Surnrnavy Kodo-cytochalasin-1 and cytochalasin € I have been shown to be identical in structure and stereoinadvertant previously chemistry by for error single-crystal cytochalasin in the stereochemistry X-ray H is corrected. diffraction a t C( analyses 18) reported ; an

The structure of a new sesquiterpene isolated from Pogostemon plectranthoides (Desf) has been assigned from its spectral properties and confirmed by X-ray crystallographic evidence. The compound has been identified as 5a-hydroxy-1 Op-selina-l,4(15),7-trien-6-one (1).Pogostemon plectranthoides (Desf) (Labiatae), a shrub which grows up to 2 m high, with pinkish white flowers and a strong odour, is found throughout most of India. Bruised leaves are reported to be applied as a cataplasm to wounds, and the juice is given for colic and fever.' During our work on pest control agents from plant materials we collected P. plectranthoides from