Task: Please create a text description for a molecule.
Molecule SMILES: COC(=O)[C@@]12OC[C@]34[C@H]([C@@H](O)[C@@H]1O)[C@@]1(C)[C@H](O)C(=O)C=C(C)[C@@H]1C[C@H]3OC(=O)[C@H](OC(=O)/C=C(\C)C(C)C)[C@@H]24
Constraint: Answer the question with complete sentences.
Result: The molecule is a quassinoid natural product found in Brucea antidysenterica consisting of a heteropentacyclic skeleton containing a delta-lactone moiety which is substituted at the alpha-carbon by a (2E)-3,4-dimethylpent-2-enoyloxy group. It shows significant in vitro cytotoxicity towards several human tumour cell lines. It has a role as a metabolite and an antineoplastic agent. It is a pentacyclic triterpenoid, an organic heteropentacyclic compound, an enone, an enoate ester, a delta-lactone, a triol, a cyclic ether, a quassinoid, a methyl ester and a secondary alpha-hydroxy ketone.
Task: Please create a {#text |!}description for a molecule{# based on its representation|!}.
{#Molecule |!}{SMILES__description}: {SMILES#}
Constraint: Answer the question with {#full|complete!} sentences.
Result: {description#}
methyl (1R,2S,3R,6R,8S,12S,13S,14R,15R,16S,17S)-3-[(E)-3,4-dimethylpent-2-enoyl]oxy-12,15,16-trihydroxy-9,13-dimethyl-4,11-dioxo-5,18-dioxapentacyclo[12.5.0.01,6.02,17.08,13]nonadec-9-ene-17-carboxylate
The molecule is a quassinoid natural product found in Brucea antidysenterica consisting of a heteropentacyclic skeleton containing a delta-lactone moiety which is substituted at the alpha-carbon by a (2E)-3,4-dimethylpent-2-enoyloxy group. It shows significant in vitro cytotoxicity towards several human tumour cell lines. It has a role as a metabolite and an antineoplastic agent. It is a pentacyclic triterpenoid, an organic heteropentacyclic compound, an enone, an enoate ester, a delta-lactone, a triol, a cyclic ether, a quassinoid, a methyl ester and a secondary alpha-hydroxy ketone.