5-(Chlorosulfonyl)-1H-indole-3-carboxylic Acid is derived from Indole-3-carboxylic Acid (I629000), which is a specific and competitive inhibitor of the potentiation of glycine of NMDA-gated current. Chemical reagent in the synthesis of thiadiazole derivatives used for anticancer activity. Molecular Formula: C9H6ClNO4S Molecular Weight: 259.67