1957 年 77 巻 9 号 p. 1015-1018
Hey and Lobs recently synthesized dl-1, 2-methylenedioxy-9-methoxy-10-hydroxy-aporphine (III) and reported that the free base is an unstable substance melting at 126-129°. Reëxamination of this reaction revealed that the pure substance of (III) came in crystals of m. p. 209-210° and it was assumed that (III) obtained by Hey and Lobs is an impure substance. Comparison of ultraviolet and infrared absorption spectra of (III) obtained here with l-phanostenine, m. p. 210°, the alkaloid of Stephania Sasakii HAYATA, showed them to be identical. It follows, therefore, that the structure of l-phanostenine would be represented by (III).