Task: Answer the following question about the molecule with SMILES Cn1c(=O)c2[nH]cnc2n(C)c1=O.Cn1c(=O)c2[nH]cnc2n(C)c1=O.NCCN.
Question: Please provide a description of this drug's mechanism of action.
Completion: Phosphodiesterase 3 inhibitor
Task: Answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
Cn1c(=O)c2[nH]cnc2n(C)c1=O.Cn1c(=O)c2[nH]cnc2n(C)c1=O.NCCN
Cn1c(=O)c2[nH]cnc2n(C)c1=O.Cn1c(=O)c2[nH]cnc2n(C)c1=O.NCCN
1,3-dimethyl-7H-purine-2,6-dione;ethane-1,2-diamine
Please provide a description of this drug's mechanism of action.