Gamboge. Part V. Synthesis of 2′-isopropyl-5′-methylbiphenyl-2,4,6-triol
Abstract
A degradation product of gambogic acid is identified as 2′-isopropyl-5′-methylbiphenyl-2,4,6-triol by comparison with synthetic material. Some related terphenyls and quaterphenyls, and 1,3-dimethoxy-6,6,9-trimethyl-6H-dibenzo[bd]pyran are described.