Plant Diversity ›› 1993, Vol. 15 ›› Issue (04): 1-3.

• Articles •    

DITERPENOID QUINONES FROM COLEUS XANTHANTHUS

LI Chao-Ming, UN Zhong-Wen, TAO Guo-Da, SUN Han-Dong   

  1. Laboratory of Phytochemistry, Kunming Institute of Botany, Academia Sinica, Kunming 650204
  • Online:1993-08-25 Published:1993-08-25

Abstract: Two new diterpenoid quinones (dimer), xanthanthusin B (la) and xanthanthusin C (2a) and, taraxerol and oleanolic acid, were isolated from Coleus xanthanthus C. Y. Wu et Y. C. Huang by column chromatography on silica geL The structure of xanthanthusin B (la) and xanthanthusin C (2a) were elucidated respectively as (13S, 15S)-2a, 12a-diacetoxy-13-spiro-cyclopropyl-grandidon A (la) and 7-epi-xanthanthusin B (2a) by spectroscopic methods.

Key words: Labiatae