diterpene alkaloid aconitane 257.41372 A terpene alkaloid fundamental parent that has formula C18H27N. C18H27N CHEBI:35911 InChI=1S/C18H27N/c1-2-11-9-19-17-14-8-15(11)18(17,5-1)16-7-10-3-4-12(14)13(16)6-10/h10-17,19H,1-9H2/t10-,11+,12+,13-,14-,15-,16-,17?,18+/m1/s1 YGJXLMNSTLJAMX-GCUFGPJWSA-N [H][C@]12CC[C@]3([H])[C@@]4([H])C[C@]5([H])[C@H]6CCC[C@@]5(C4NC6)[C@]([H])(C1)[C@]3([H])C2 aconitane chebi_ontology terpene alkaloid fundamental parent