Serratinine, one of major alkaloids of Lycopodium serratum THUNB. var. Thunbergii MAKINO, is a tetracyclic new alkaloid possessing an expanded formula, C10H15(〓CH-OH)(〓CH-OH)(〓CH-CH3)(-COCH2-) (-N-). On the basis of chemical and spectroscopic data, the partial structure (C) for serratinine was proposed.
