Question: How many heavy (non-hydrogen) atoms does this compound have?
Constraint: The Molecule can be represented with the SMILES Cn1c(COP(=O)(NCCBr)NCCBr)cnc1[N+](=O)[O-].
Answer: 21
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
Cn1c(COP(=O)(NCCBr)NCCBr)cnc1[N+](=O)[O-]
Cn1c(COP(=O)(NCCBr)NCCBr)cnc1[N+](=O)[O-]
2-bromo-N-[(2-bromoethylamino)-[(3-methyl-2-nitroimidazol-4-yl)methoxy]phosphoryl]ethanamine
How many heavy (non-hydrogen) atoms does this compound have?
21