(4S)-4-Phenyl-3-[(2E)-2-(1,2,6,7-tetrahydro-8H-indeno[5,4-b]furan-8-ylidene)acetyl]-2-oxazolidinone;2-Oxazolidinone,4-phenyl-3-[(2E)-2-(1,2,6,7-tetrahydro-8H-indeno[5,4-b]furan-8-ylidene)acetyl]-, (4S)-,(S,E)-4-phenyl-3-(2-(1,2,6,7-tetrahydro-8H-indeno[5,4-b]furan-8-ylidene)acetyl)oxazolidin-2-one,Ramelteon