SMILES: C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(C[C@H](C(=O)C5(C)C)O)C)C)[C@@H]2[C@]1(C)O)C)C(=O)O
Description: The molecule is a pentacyclic triterpenoid that is urs-12-ene substituted by a carboxy group at position 28, alpha-configured hydroxy groups at positions 2 and 19 and an oxo group at position 3. Isolated from the whole plants of Geum japonicum, it exhibits activity against HIV-1 protease. It has a role as a metabolite and a HIV protease inhibitor. It is an oxo monocarboxylic acid, a diol, a pentacyclic triterpenoid and a secondary alpha-hydroxy ketone. It derives from a hydride of an ursane.