A new clerodane-type <img src='/image/spc_char/gamma2.gif' border=0>-hydroxybutenolide diterpene from the bark of <i style="">Polyalthia longifolia</i> var. <i style="">angustifolia</i>

Abstract

A new clerodane-type <img src='/image/spc_char/gamma2.gif' border=0>-hydroxybutenolide diterpene has been isolated from the bark of <i style="">Polyalthia longifolia</i> var. <i style="">angustifolia</i>. Its structure has been established as (<i style="">Z</i>)-4-hydroxy-3-(2<b style="">″</b>6<b style="">″</b>-hydroxy-5<b style="">″</b>-(hydroxymethyl)-5<b style="">″</b>,8<b style="">″</b>a-dimethylocta­hy­dro-1<i style="">H</i>-spiro­[naphthalene-2<b style="">″</b>,2<b style="">″′</b>-oxiran]-1<b style="">″</b>-yl) ethylidene)dihydro­furan-2(3<i style="">H</i>)-one, on the basis of chemical and spectral (UV, IR,¹H,¹³C, HETROCOSY and mass) data analysis.