4.2.3.B68	geranylgeranyl diphosphate = spiroalbatene + diphosphate	-	-	
4.2.3.B68	geranylgeranyl diphosphate = spiroalbatene + diphosphate	cyclization mechanism from GGPP to spiroalbatene involving 1,14-cyclization to cation, followed by a 1,2-hydride migration, another 1,2-hydride shift, and ring closure, followed by a third 1,2-hydride shift and cyclization, yielding a cyclopropane intermediate, and opening of the three-membered ring with concomitant ring closure	-, 746752