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Communication | Special issue | Vol 5, No. 1, 1976, pp.227-232
Published online, 1st January, 1970
DOI: 10.3987/S-1976-01-0227
Diterpenic Lactones of Mallotus repandus

Takeshi Kawashima, Tetsuo Nakatsu, Yoshimasa Fukazawa, and Shô Itô*

*Department of Chemistry, Graduate School of Science, Tohoku University, Aobayama, Sendai 980-8578, Japan


From the title plant obtained in Sarawak, two lactones were isolated and characterized in addition to lupeol and taraxerol. Mallotucin A, 1, m.p. 201 -202 °, was found to be identical with teucvin isolated from Teucrium viscidum var. Miquelianum: The present result reinforces the previous structure assignment. Mallotucin B, 2, m.p. 131.5-132.5 °, was found to be the first diterpenoid with geminal methoxycarbonyl groups.