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