Abstract
The lignan, m.p. 146.5-147°, [α]24D: -87.3° (c=1.79 in CHCl3), were obtaind with wax from the dried leaves of cypress (Chamaecyparis obtusa). The liguan was also obtained from Chamaecyparis obtusa var. breviramea and corresponded to the molecular formula of C20H16O6. It is assumed to be identical with savinin obtained from the leaves of the juniper species by Hartwell and others, by the agreement of its specific rotation and ultraviolet and infrared absorption spectra. This substance is also identical with hibalactone obtained from Nikko cypress and Ch. obtusa var. breviramea and must be α-(3, 4-methyledioxybenzylidene)-β-(3, 4-methylenedioxybenzyl)-butyrolactone (I) from the ultraviolet and infrared spectral data.
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