Question: Please describe this drug.
Description: The Compound has the SMILES O=S(=O)(O)CCS.
Answer: 2-mercaptoethanesulfonic acid is a Cytoprotective Agent.
{#Question|Q!}: {quest#}
{#Constraint:|Description:|!} The {#Molecule|Compound|Chemical!} {#has the|can be represented with the!} {SMILES__description} {SMILES#}.
{#Answer|Result|Answer!}: {answ#}
O=S(=O)(O)CCS
C(CS(=O)(=O)O)S
2-sulfanylethanesulfonicacid
Please describe this drug.