A new diterpenoid dimer annonebinide A has been isolated from the stems of Annona glabra. Its structure was determined to be ent-16a-hydroxykauran-17-yl ent-16b-kauran-17-oate on the basis of spectroscopic and chemical evidence. A new diterpenoid dimer annonebinide A has been isolated from the stems of Annona glabra. Its structure was determined to be ent-16a-hydroxykauran-17-yl ent-16b-kauran-17-oate on the basis of spectroscopic and chemical evidence.