英文别名(1,2,6,7-Tetrahydro-8H-indeno[5,4-β]furan-8-ylidene)acetonitrile; Acetonitrile, 2-(1,2,6,7-tetrahydro-8H-indeno[5,4-b]furan-8-ylidene)-; Ramelteon Impurity 55; Acetonitrile,2-(1,2,6,7-tetrahydro-8H-indeno[5,4-b]furan-8-ylidene); (1,6,7,8-tetrahydro-2H-indeno[5,4-b]furan-8-ylidene)acetonitrile; 1,2,6,7-tetrahydro-8H-indeno[5,4-b]furan-8-ylideneacetonitrile 
