PHLOROGLUCINOL DERIVATIVES AND OTHER CONSTITUENTS FROM SOUTH AFRICAN HELICHRYSUM SPECIES

Article abstract of DOI:10.1016/S0031-9422(00)81569-1

Key Word Index - Helichrysum species; Compositae; phloroglucinol derivatives; chromanes; benzofuranes; α-pyrone derivatives; diterpenes; geranyl linalol derivatives; isocomene derivative. The investigation of 11 South African Helichrysum species afforded in addition to known compounds 26 further phloroglucinol derivatives, nine diterpenes, a derivative of isocomene and an α-pyrone derivative.The structures were elucidated by highfield NMR spectroscopy and a few chemical transformations.Furthermore the structures of several phloroglucinol derivatives were established by synthesis.The chemotaxonomy is discussed.