Cryptoquinonemethides D and E, C 30-terpene quinone methides, from Cryptomeria japonica

• Published in: Phytochemistry (Oxford) Vol. 31; no. 12; pp. 4289 - 4294
• Main Author: Shibuya, Tsuyoshi
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 1992
• Subjects: 21α- and 21β-hydroxy-21-deoxochamaecydins; C 30-terpene quinone methides; chamaecydins; cone; Cryptomeria japonica; cryptoquinonemethides; dihydrochamaecydins; male flower; Taxodiaceae; Cryptomeria japonica; dihydrochamaecydins; C 30-terpene quinone methides; chamaecydins; Taxodiaceae; male flower; 21α- and 21β-hydroxy-21-deoxochamaecydins; cone; cryptoquinonemethides
• ISSN: 0031-9422; 1873-3700
• DOI: 10.1016/0031-9422(92)80460-V

Two new C 30-terpene quinone methides, named cryptoquinonemethides D and E, were isolated from the cones of Cryptomeria japonica, in addition to three known quinone methides, chamaecydin, isochamaecydin, and chamaecydinol. The structures of new quinone methides were characterized as 21α- and 21β-hydroxy-21-deoxochamaecydins by chemical and spectroscopic methods. Furthermore, the structure of isochamaecydin was reinvestigated and determined unambiguously.