Chemical constituents of chloroform extract from the lichen Ramalina peruviana Arch (Ramalinaceae)

Abstract

From the chloroform extract of the lichen Ramalina peruviana Ach. (Ramalinaceae), collected at Cau Dat farm, Lam Dong province, Vietnam, eight organic compounds had been isolated: nonadecan-1-ol (1); nonadecenoic acid (2); (+)-(12R)-usnic acid (3); three monophenolic compounds- rhizonic acid (4), divarinolmonomethylether (5) and divaricatinic acid (6); and two depsides- decarboxy-2'-O-methyldivaricatic acid (7) and sekikaic acid (8). The Chemical structure of these compounds was elucidated by spectroscopic analysis as well as high resolution ESI MS analysis and comparison with those reported in the literature.