Structure of Calliterpenone Hemihydrate.-The title diterpenoid (I)·0.5 H2O (space group C2 with Z = 4) has been isolated from the petroleum ether extract of Callicarpa cana L. -(WONG, W. H.; WEI, C.; LOKE, S. E.; MAK, T. C. W.; Acta Crystallogr., Sect. C: Cryst. Struct. Commun. 47 (1991) 4, 906-908; Dep. Chem., Chin. Univ. Hong Kong, Shatin, New Territories, Hong Kong; EN)
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