dihydro-5(S)-(hydroxymethyl)-3(R)-(phenylmethyl)-3(2H)-furanone

dihydro-5(S)-(((tert-butyldimethylsilyl)oxy)methyl)-3(R)-(phenylmethyl)-3(2H)-furanone

dihydro-5(S)-[[[(trifluoromethyl)sulfonyl]oxy]methyl]-3(R)-(phenylmethyl)-3(2H)-furanone

2(R)-(phenylmethyl)-4(S)-<(tert-butyldimethylsilyl)oxy>-5-<1-<4-<(1,1-dimethylethoxy)carbonyl>-2(S)-(N-tert-butylcarbamoyl)piperazinyl>>pentanoic acid

N-(2(R)-hydroxy-1-(S)-indanyl)-2(R)-(phenylmethyl)-4(S)-[(tert-butyldimethylsilyl)oxy]-5-[1-[4-[(1,1-dimethylethoxy)carbonyl]-2(S)-(N-tert-butylcarbamoyl)piperazinyl]]pentanamide