Abstract
Antifungal component, C12H8O, m. p. 81°, in the essential oil of Artemisia capillaris Thunb., was named capillin. From the infrared absorption spectral data and catalytic reduction product of capillin, its structure was assumed to be 1-oxo-1-phenylhexa-2, 4-diyne (I). (I) was synthesized from 2-butyne-1, 4-diol (V), and its various constants and infrared absorption spectral data (Fig. 1) agreed with those of capillin obtained by extraction, thereby confirming the structure of capillin to be 1-oxo-1-phenylhexa-2, 4-diyne.
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