Three novel neo-clerodane diterpenoids, namely, 15,16-epoxy-7 alpha,18
-dihydroxy-15-oxo-ent-cleroda-3-ene,7 alpha,15,18-trihydroxy-ent-clero
da-3-ene and 15,16-diacetoxy-7 alpha,18-dihydroxy-ent-cleroda-3-ene, t
ogether with two known diterpenoids, 5,16-epoxy-18-hydroxy-15-methoxy-
ent-cleroda-3-ene and 15,16-epoxy-7 alpha,18-dihydroxy-15-methoxy-ent-
cleroda-3-ene, were isolated from the aerial parts of Baccharis genist
elloides. Eupatorin, cirsimaritin, 5-hydroxy-3',4',6,7-tetramethoxyfla
vone, spathulenol and trans-phytol were also identified from this Bacc
haris species.