Chemical studies on the constituents of the thymelaeaceous plants. I. Structures of two new flavans from Daphne odora Thunb.

Abstract

Three new flavans, daphnodorin A(1), daphnodorin B(2) and daphnodorin C(3), as well as four known coumarins, daphnetin, daphnoretin, umbelliferone and daphneticin, were isolated from the root and the bark of Daphne odora THUNB. The plane structures of 1 and 2 were established by chemical and spectroscopic means.