Neoclerodane diterpenoids from teucrium massiliense
A reinvestigation of the diterpene metabolites of Teucrium massiliense L. allowed the isolation of four new neoclerodane derivatives, teumassilenins A-D, together with all the diterpenoids previously reported as constituents of this plant. The structures of the new compounds (1-4) were established by chemical and spectroscopic means. A plausible biogenetic relationship between several of these substances is briefly discussed, and some unpublished physical and spectroscopic data of the previously known diterpenoid teumassin (5) are now reported.
Fontana
G
Dipartimento di Chimica Organica, Universita di Palermo, Via Archirafi 20, I-90123 Palermo, Italy, and Instituto de Quimica Organica, Consejo Superior de Investigaciones Cientificas (CSIC), Juan de la Cierva 3, E-28006 Madrid, Spain.
Paternostro
MP
Savona
G
Rodriguez
B
de la Torre MC