Studies on the Constituents of Medicinal and Related Plants in Sri Lanka. IV. Isolation and Structure Determination of Hyperenone-B, Mysorenone-B, and Mysorenone-C from Hypericum mysorense HEYNE and Synthesis of Hyperenone-A and -B

Abstract

Three new compounds named hyperenone-B, mysorenone-B, and mysorenone-C were isolated from Hypericum mysorense HEYNE, collected in Sri Lanka, and their structures were determined. In addition, hyperenone-A and -B, novel γ-pyrone derivatives, were synthesized.