Taxuspinananes A and B, New Taxoids from Taxus cuspidata var. nana

Abstract
New taxoids, taxuspinanane A (1), showing potent cytotoxic activity, and taxuspinanane B (2), have been isolated from the stems of Taxus cuspidata Sieb. et. Zucc. var. nana Rehder. Their structures were elucidated by extensive 2D NMR and MS spectroscopic analysis.