User: I'm searching for the SMILES of a molecule that can be described as:
The molecule is a member of the class xanthones which consists of a dihydroxanthone skeleton substituted by a acetyloxy group at position 4, a hydroxy group at position 8, a methyl group at position 6 and a methoxycarbonyl group at position 4a (the 4R,4aS stereoisomer). It is isolated from Penicillium and exhibits potent antitumour activity against both human and murine tumour cell lines. It has a role as an antineoplastic agent, an antimicrobial agent and a Penicillium metabolite. It is a diester, a member of xanthones, a member of phenols, an acetate ester and a methyl ester.
Assistant: This is a molecule that fits this description: COC(=O)[C@]12Oc3cc(C)cc(O)c3C(=O)C1=CC=C[C@H]2OC(C)=O
User: I'm {#searching|looking!} for the {SMILES__description} of a molecule that can be described {#by|as!}:
{description#}
Assistant: This is a molecule that fits {#your|this!} description: {SMILES#}
methyl (4R,4aS)-4-acetyloxy-8-hydroxy-6-methyl-9-oxo-4H-xanthene-4a-carboxylate
The molecule is a member of the class xanthones which consists of a dihydroxanthone skeleton substituted by a acetyloxy group at position 4, a hydroxy group at position 8, a methyl group at position 6 and a methoxycarbonyl group at position 4a (the 4R,4aS stereoisomer). It is isolated from Penicillium and exhibits potent antitumour activity against both human and murine tumour cell lines. It has a role as an antineoplastic agent, an antimicrobial agent and a Penicillium metabolite. It is a diester, a member of xanthones, a member of phenols, an acetate ester and a methyl ester.