Synonyms: Spiro[indoline-2,3'-[3H]naphth[2,1-b][1,4]oxazine],1,3,3-trimethyl- (8CI); 1,3,3-Trimethylspiro[indoline-2,3'-[3H]naphth[2,1-b][1,4]oxazine];1,3-Dihydro-1,3,3-trimethylspiro[2H-indole-2,3'-(3H)-naphth[2,1-h][1,4]oxazine];1,3-Dihydro-1,3,3-trimethylspiro[2H-indole-2,3'-[3H]naphtha[2,1-b][1,4]oxazine;1,3-Dihydro-1,3,3-trimethylspiro[2H]-indole-2,3'-[3H]naphth[2,1-b][1,4]oxazine;Photorom I; Photorome I; Variacrol Blue A