1-Indolineacetic acid, 2,3-dioxo-, ethyl ester 1H-Indole-1-acetic acid, 2,3-dihydro-2,3-dioxo-, ethyl ester (9CI) 2,3-Dioxo-1-indolineacetic acid ethyl ester 4-21-00-05001 (Beilstein Handbook Reference) 41042-21-1 BRN 0218567 INDOLINE-1-ACETIC ACID, 2,3-DIOXO-, ETHYL ESTER NSC 136016