RAC RAMELTEON-D3 rac N-[[1,6,7,8-Tetrahydro-2H-indeno[5,4-b]furan-8-yl]ethyl]propanamide-d3 rac Rozerem-d3 rac TAK-375-d3 rac N-[[1,6,7,8-Tetrahydro-2H-indeno[5,4-β]furan-8-yl]ethyl]propanamide-d3 (ac N-[[1,6,7,8-Tetrahydro-2H-indeno[5,4-b]furan-8-yl]ethyl]propanamide-D3 [2H3]- (±)-Ramelteon