SMILES: C=C1CC[C@@H]2[C@@H]([C@@H]3[C@H]1CC(=O)[C@]34CC[C@]5([C@@]4(C[C@@H]6[C@H]5[C@@H]7[C@@H](CCC6=C)C(=C)C(=O)O7)O)O)OC(=O)C2=C
Description: The molecule is a sesquiterpene lactone isolated from the whole plants of Ainsliaea macrocephala; exhibits inhibitory activity against production of nitric oxide (NO). It has a role as a metabolite and an EC 1.14.13.39 (nitric oxide synthase) inhibitor. It is a spiro compound and a sesquiterpene lactone.