1131-09-5 3-Benzo(b)thienylacetic acid 3-Benzo(b)thiopheneacetic acid 5-18-06-00447 (Beilstein Handbook Reference) Acetic acid, 3-benzo(b)thienyl- BRN 0143357 Benzo(b)thiophene-3-acetic acid Benzothiophene-3-acetic acid EINECS 214-461-2 NSC 18875 NSC 93635