Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
Quinones and Related Compounds in Higher Plants. II. On the Naphthoquinones and Related Compounds from Catalpa Wood
井上 博之奥田 拓男林 利光
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1975 年 23 巻 2 号 p. 384-391

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As the naphthoquinones and a derivative relating to the already reported catalpalactone (1), the following seven substances have been isolated from Catalpa ovata wood : α-lapachone (3), α-dihydrocaryopterone (=9-hydroxy-α-lapachone) (4), 9-methoxy-α-lapachone (5), 4-hydroxy-α-lapachone (6), 4, 9-dihydroxy-α-lapachone (7), 4-oxo-α-lapachone (8) and catalponol (9). Their sturctures, except catalponol (9) have been clarified.

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