Synonyms: Spiro[2H-1-benzopyran-2,2'-indoline],8-methoxy-1',3',3'-trimethyl-6-nitro- (6CI,7CI,8CI);1,3,3-Trimethyl-6'-nitro-8'-methoxyspiro(indoline-2,2'-benzopyran);1,3,3-Trimethyl-6'-nitro-8'-methoxyspiro[indolinobenzopyran];1,3,3-Trimethylindolino-6'-nitro-8'-methoxybenzopyrylspiran;1,3,3-Trimethylindolino-6'-nitro-8'-methoxybenzospiropyran;1,3,3-Trimethylindolino-8'-methoxy-6'-nitrobenzospiropyran;1',3',3'-Trimethyl-8-methoxy-6-nitrospiro(2H-1-benzopyran-2,2'-indoline);1',3'-Dihydro-8-methoxy-1',3',3'-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2'-(2H)-indole];1'3',3'-Trimethyl-6-nitro-8-methoxyspiro[2H-1-benzopyran-2,2'-indoline];2',3'-Dihydro-8-methoxy-1',3',3'-trimethyl-6-nitrospiro[2H-1-benzopyran-2,2'-indole];6'-Nitro-8'-methoxy-1,3,3-trimethylindolinobenzopyrylspiran;6'-Nitro-8'-methoxy-1,3,3-trimethylspiro[indoline-2,2'-benzopyran];8-Methoxy-1',3',3'-trimethyl-6-nitrospiro(2H-1-benzopyran-2,2'-indoline);8-Methoxy-6-nitro-1',3',3'-trimethylspiro[2H-1-benzopyran-2,2'-indoline];8'-Methoxy-6'-nitro-1,3,3-trimethylspiro(indolino-2,2'-benzopyran); MNSP; NSC206175; SP 2; SP 2 (dye); Spiromer 68NM