Abstract The presence of 3-(10′-phenyldecyl)-(2)(2%), 3-(12′-phenyldodecyl)-(3)(6%), 4- (10′-phenyldecyl)-(4)(0.3%) and 4-(12′-phenyldodecyl)-benzene-1, 2-diol (5)(0.3%) in Burmese lac, the sap of Melanorrhoea usitata Wall has been confirmed by the synthesis of these compounds and a comparison of the gas chromatographic retention times and the mass spectral characteristics of their bis-O-(trimethylsilyl) derivatives with the derivatives ...
