[{"from": "human", "value": "Provide a description of this molecule. [C][C@@][C][C][C@][Branch2][Branch1][Branch1][C][C][=Branch1][C][=O][C][Branch2][Ring2][Branch2][C][=C][Ring1][#Branch1][C@H1][Ring1][O][C][C][C@H1][C@][Ring1][#C][Branch2][Ring1][#Branch1][C][C][C@@H1][C@@][Ring1][=Branch1][Branch1][=C][C][C][C][=Branch1][C][=O][C][Ring1][#Branch1][Branch1][C][C][C][C][C][Branch1][C][C][C][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a pentacyclic triterpenoid that is olean-18-ene substituted by a carboxy group at position 28 and oxo groups at positions 3 and 21 respectively. Isolated from the leaves of Acacia aulacocarpa, it exhibits inhibitory activity against Tie2 kinase (EC 2.7.10.1) as well as modest activity against a variety of cultured mammalian cells. It has a role as a metabolite and an EC 2.7.10.1 (receptor protein-tyrosine kinase) inhibitor. It is a pentacyclic triterpenoid and a dioxo monocarboxylic acid. It derives from a hydride of an oleanane."}]