Cerberalignans J-N, oligolignans from Cerbera manghas

Following the isolation of sesqui-, di-, sester- and tri-lignans from the stems of Cerbera manghas, five complex lignans, cerberalignans J (olivil-4.0.8″-threo-guaiacylglycerol), K (olivil-5.′5″-cycloolivil), L (olivil-5.5″- cycloolivil), M (olivil-5.5″-olivil-43′.0.84′-threo-guaiacylglycerol) and N (olivil-5′.5″-olivil-4‴.0.84′-threo-guaiacylglycerol), were isolated and their structures elucidated by spectral methods.