2. 147. The chemistry of the “insoluble red” woods. Part I. Pterocarpin and homopterocarpin Alexander McGookin,Alexander Robertson,William B. Whalley J. Chem. Soc. 1940 787
10. An efficient synthesis of the four mono methylated isomers of (+)-catechin including the major metabolites and of some dimethylated and trimethylated analogues through selective protection of the catechol ring Cécile Cren-Olivé,Stéphane Lebrun,Christian Rolando J. Chem. Soc. Perkin Trans. 1 2002 821