Recently some of us (S a n t o s et al., 1970) isolated from the leaves of Cyanotis vaga S c h u 1 t e s (Commelinaceae) an insect moulting steroid, C27H4407, for which the name commisterone was proposed, and it was considered to be a stereoisomer of ecdysterone on the basis of the spectroscopic and physical data. T a b l e 1 TLC behaviours of phytoecdysones Rp value Colour produced CHC1,-MeOH AcOEt-EtOH
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