Question: Please describe this drug.
 The Molecule has the SMILES CCCCC[C@H](O)/C=C/[C@@H]1[C@H]2CC(=CCCCC(=O)[O-])O[C@H]2C[C@H]1O.[Na+].
Answer: Epoprostenol sodium is a prostanoid.
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
CCCCC[C@H](O)/C=C/[C@@H]1[C@H]2CC(=CCCCC(=O)[O-])O[C@H]2C[C@H]1O.[Na+]
CCCCC[C@@H](/C=C/[C@H]1[C@@H](C[C@H]2[C@@H]1CC(=CCCCC(=O)[O-])O2)O)O.[Na+]
sodium;5-[(3aR,4R,5R,6aS)-5-hydroxy-4-[(E,3S)-3-hydroxyoct-1-enyl]-3,3a,4,5,6,6a-hexahydrocyclopenta[b]furan-2-ylidene]pentanoate
Please describe this drug.