Indigotindisulfonate

Overview

Indigotindisulfonate is a small molecule active pharmaceutical ingredient (ChEMBL CHEMBL1091250).

Patent & exclusivity (US)

Per the FDA Orange Book (1 approved US product), the latest listed US patent on Indigotindisulfonate expires 23 Dec 2037 and exclusivity 7 Jul 2027. Generic API sourcing typically opens up once these lapse.

Chemical identity

IUPAC name

(2E)-3-oxo-2-(3-oxo-5-sulfo-1H-indol-2-ylidene)-1H-indole-5-sulfonic acid

Canonical SMILES

C1=CC2=C(C=C1S(=O)(=O)O)C(=O)/C(=C\3/C(=O)C4=C(N3)C=CC(=C4)S(=O)(=O)O)/N2

InChIKey

CFZXDJWFRVEWSR-BUHFOSPRSA-N