Hirtusneanoside, an Unsymmetrical Dimeric Tetrahydroxanthone from the Lichen Usnea hirta

Hirtusneanoside, an Unsymmetrical Dimeric Tetrahydroxanthone from the Lichen <i>Usnea hirta</i> Usnic Acid Derivatives with Cytotoxic and Antifungal Activities from the Lichen <i>Usnea longissima</i> Usnic Acid Derivatives with Cytotoxic and Antifungal Activities from the Lichen <i>Usnea longissima</i> Stictic Acid Derivatives from the Lichen <i>Usnea </i><i>articulata</i> and Their Antioxidant Activities A xanthone C-glycoside from Iris nigricans Usimines A−C, Bioactive Usnic Acid Derivatives from the Antarctic Lichen <i>Stereocaulon alpinum</i> Usimines A−C, Bioactive Usnic Acid Derivatives from the Antarctic Lichen <i>Stereocaulon alpinum</i> Ambewelamides A and B, antineoplastic epidithiapiperazinediones isolated from the lichen Usnea sp. Xanthones from Schultesia lisianthoides Two novel butanol rhamnosides from an Indian traditional herb,<i>Euphorbia hirta</i>