NEW PHLOROGLUCINOL DERIVATIVES IN DRYOPTERIS-PULVINULIFERA AND D-SUBTRIANGULARIS (PTERIDOPHYTA, DRYOPTERIDACEAE)

The phloroglucinol compositions of Dryopteris pulvinulifera (Beddome) Kuntze and D. subtriangularis (C. Hope) C. Chr. from North India have been investigated. D. pulvinulifera contains virtually only pulvinulif erin-VV (33-VV), a new two-ring phloroglucinol derivative, the structu re of which could be elucidated by degradation, NMR and mass spectrome try. In D. subtriangularis two new phloroglucinol derivatives were fou nd; i.e. albaspidin-iBiB (10-iBiB), so far known only as a synthetic c ompound and subtriangularin-iB (34-iB), the structure of which could b e partly solved by NMR and high resolution mass spectrometry.