The Structure and Stereochemistry of Four New Sesquiterpenes Isolated from the Wood Oil of “Kaya” (Torreya nucifera)

Four new sesquiterpenes, nuciferal (II), nuciferol (III), torreyal (IV) and neotorreyol (V), together with dendrolasin and o-methoxycinnamic aldehyde, have been isolated from the neutral volatile wood oil of Kaya (Torreya nucifera Sieb. et Zucc.) by adsorption chromatography on silica gel. The structures and stereochemistry of these new compounds have been confirmed by infrared, ultraviolet, NMR and MS spectrometry, as well as by chemical methods.