A new kaurane diterpene dimer from Parinari campestris

A new kaurane diterpene dimer, 15-oxozoapatlin-13α-yl-10′α,16′α-dihydroxy-9′α-methyl-20′-nor-kauran-19′-oic acid γ-lactone-17′-oate (1), together with the known 13-hydroxy-15-oxozoapatlin (2), 10α,13α,16α,17-tetrahydroxy-9α-methyl-15-oxo-20-nor-kauran-19-oic acid γ-lactone (3), 2α,10α,13α,16α,17-pentahydroxy-9α-methyl-15-oxo-20-nor-kauran-19-oic acid (19,10)-lactone (4), 3α,10α,13α,16α,17-pentahydroxy-9α-methyl-15-oxo-20-nor-kauran-19-oic acid γ-lactone (5), and 1β,16α,17-trihydroxy-ent-kaurane (6) were isolated from the leaves of Parinari campestris and identified on the basis of detailed spectral analysis, including 2D NMR spectrometry and ESI-MS.