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Three new diterpenoids, 10-hydroxy-cembrene-5-one, 6-hydroxy-cembrene-5,10-dione and 2α,4β,15,16-tetrahydroxyl-dolabradane were isolated from the petroleum ether fraction of the alcoholic extract of Mallotus apelta Muell.Arg. Their structures were determined by spectral methods.
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