Abstract
A novel anthocyanidin glycoside, abacopterin J ( 1), together with the known eruberin B ( 2) and eruberin C ( 3) was isolated from the fern Abacopteris penangiana (Hook.) Ching . The structure of the new compound 1 was elucidated on the basis of extensive spectroscopic analysis, including HSQC, HMBC, 1 H– 1 H COSY and ROESY, and chemical evidence. Abacopterin J is the first example of an anthocyanidin glycoside isolated from natural sources, which is comprised of a flavan and an anthocyanidin moiety.
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