sesquiterpene terpenoid fundamental parent eudesmane (1R,4aR,7R,8aS)-1,4a-dimethyl-7-(propan-2-yl)decahydronaphthalene (1R,4aR,7R,8aS)-7-isopropyl-1,4a-dimethyldecahydronaphthalene 208.38280 A terpenoid fundamental parent that has formula C15H28. Beilstein:2498027 C15H28 CAS:473-11-0 CHEBI:36522 DYEQPYSFRWUNNV-APIJFGDWSA-N InChI=1S/C15H28/c1-11(2)13-7-9-15(4)8-5-6-12(3)14(15)10-13/h11-14H,5-10H2,1-4H3/t12-,13-,14+,15-/m1/s1 [H][C@@]12C[C@@H](CC[C@@]1(C)CCC[C@H]2C)C(C)C chebi_ontology eudesmane