Novel Bis(bibenzyl) and (Propylphenyl)bibenzyl Derivatives from Dendrobium nobile

Abstract Two novel compounds possessing a bis(bibenzyl) (see 1 ) and a (propylphenyl)bibenzyl skeleton (see 2 ) and eight known compounds were isolated from the stems of Dendrobium nobile Lindl . (Orchidaceae). Their structures were identified by spectroscopic analyses.