Anti-tumor Activities of Some Lichen Products and Their Degradation Products

Abstract

Anionic and cationic resins-adsorbed fractions of 44 lichens, hot water extracts of 9 lichens, and 20 lichen metabolites and their degradation products were assayed for their antitumor activity by the use of ascitic or solid-type Ehrlich carcinoma. Among them, the adsorbed fraction of Ramalina almquistii VAIN., d-protolichesterinic acid (1) and nephrosterinic acid (2) were effective against the solid-type Ehrlich carcinoma.