diterpene terpenoid fundamental parent tigliane C20H34 274.485 tigliane chebi_ontology C1[C@@]2([C@@]([C@]3([C@@](C[C@H](C3)C)(C[C@@H]1C)[H])[H])([C@H](C)C[C@@]4([C@]2(C4(C)C)[H])[H])[H])[H] CAS:67707-87-3 Tiglian CHEBI:37526 (1aS,1bR,3S,4aS,6R,7aR,7bR,8R,9aR)-1,1,3,6,8-pentamethyltetradecahydro-1H-cyclopropa[3,4]benzo[1,2-e]azulene 0 CGVXVPQJMYMMIH-HKDZDBKOSA-N 274.26605 InChI=1S/C20H34/c1-11-6-14-7-12(2)9-16-18(15(14)8-11)13(3)10-17-19(16)20(17,4)5/h11-19H,6-10H2,1-5H3/t11-,12+,13-,14+,15-,16-,17-,18-,19+/m1/s1