1,2-Dimethoxy-6-methyl-4H-dibenzo[de,g]quinoline-4,5(6H)-dione

A further aporphine type alkaloid obtained from the callus tissue of Stephania cepharantha, this alkaloid is the dimethoxy analogue of the preceding base. It also forms orange needles and gives a bright orange fluorescence. The ultraviolet spectrum in EtOH has absorption maxima at 213, 244, 303, 315 and 440 nm with a shoulder at 273 nm.

ChEBI: Cepharadione B is an isoquinoline alkaloid. It is functionally related to an aporphine.

Akasu, Itokawa, Fujita, Tetrahedron Lett., 3609 (1974)