Four tirucallane derivatives, 3 beta,22S-dihydroxy-tirucalla-7,24-dien-23-o
ne, 22,23-epoxy-tirucalla-7-ene-3 beta,24,25-triol, 3 beta,25-dihydroxy-tir
ucalla-7,23 -diene, 23,26-dihydroxy-tirucalla-7,24-dien-3-one, together wit
h two known triterpenoids, 24,25-epoxy-3 beta,23-dihydroxy-7-tirucallene, t
irucalla-7,24-diene-3 beta,23-diol, were isolated from Dysoxylum hainanense
. Their structures were elucidated on the basis of spectroscopic evidence.
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