TY - JOUR A1 - Ghisalberti, EL A1 - Jefferies, PR A1 - Mori, TA A1 - Patrick, VA A1 - White, AH T1 - The chemistry of Eremophila spp. XIX. New cembrane diterpenes from E. granitica and E. abietina JF - Australian Journal of Chemistry JO - Aust. J. Chem. Y1 - 1983 VL - 36 IS - 6 SP - 1187 EP - 1196 KW - UR - https://doi.org/10.1071/CH9831187 N2 - The isolation and structural elucidation of five new cembrane diterpenes from two Eremophila species is reported. (1R,3S,4S,7E,11Z)-3,15-Epoxy-19-oxocembra-7,11-dien-18-oic acid (3) and (1R,3S,4S,7Z,11Z)-3,15-epoxycembra-7,11-dien-18-oic acid (7) were isolated from E. granitica, and dimethyl(1R,3S,4S,7E,11Z)-3,15-epoxycembra-7,11-diene-18,19-dioate (16), (1R,3S,4S,8R,11Z)-3,15-epoxycembr-11-ene-18,19-dioic acid (14) and its dimethyl ester were isolated from E. abietina. Structural studies on the diol derived from (14) were carried out by single-crystal X-ray diffraction analysis. ER -