1',3',3'-Trimethyl-6-nitroindolene-2-spiro-2-benzopyran 1',3',3'-Trimethyl-6-nitrospiro(2H-1-benzopyran-2,2'-indoline) 1',3'-Dihydro-1',3',3'-trimethyl-6-nitrospiro(2H-1-benzopyran-2,2'-(2H)indole) 1,3,3-Trimethyl-6'-nitroindoline-2-spiro-2'-benzopyran 1498-88-0 4-27-00-01460 (Beilstein Handbook Reference) 6'-Nitro-1,3,3-trimethylindolinobenzopyrylspiran 81558-16-9 BRN 0040498 EINECS 216-102-5 NSC 206176 Spiro(2H-1-benzopyran-2,2'-(2H)indole), 1',3'-dihydro-1',3',3'-trimethyl-6-nitro- Spiro(2H-1-benzopyran-2,2'-indoline), 1',3',3'-trimethyl-6-nitro- (8CI) Spiro(2H-1-benzopyran-2,2'-indoline), 6-nitro-1',3',3'-trimethyl-