campesterol 4 cholesterol 4 drug isolation 4 nonhuman 4 sitostanol 4 sitosterol 4 stigmasta 3,5 dien 7 one 4 unclassified drug 4 24 ethylidenecholesta 3,5,24 triene 2 24 methylidenecholesta 3,5,24 triene 2 4',5,7 trihydroxy 3',5' dimethoxyflavone 2 5,6 dihydrocampesterol 2 7 dehydrocholesterol 2 Embryophyta 2 Poa 2 Senecio crassiflorus 2 cholestanol 2 choline 2 chrysin 2 controlled study 2 delta7 sitosterol 2 dihydrocampesterol 2 dihydrositosterol 2 dihydrostigmasterol 2 drug analysis 2 drug identification 2 gas liquid chromatography 2 higher plant 2 luteolin 2 mass spectrometry 2