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Communication | Regular issue | Vol 32, No. 1, 1991, pp.19-21
Published online, 1st January, 1970
DOI: 10.3987/COM-90-5624
Calicophirins A and B, Two New Insect Growth Inhibitory Diterpenoids from a Gorgonian Coral Calicogorgia Sp.

Masamitsu Ochi,* Koji Yamada, Katsuyuki Shirasse, Hiyoshizo Kotsuki, and Kozo Shibata*

*Department of Material Science, Faculty of Science, Kochi University, 2-5-1, Akebono-cho, Kochi 780-8520, Japan

Abstract

Two new diterpenoids, calicophirins A and B, which exhibit insect growth inhibitory activity against the silkworm, Bombyx mori L., have been isolated from a gorgonian coral Calicogorgia sp. and their structure were fully characterized by extensive 2D-nmr studies.