(2'E,1'S,6R,3aS,6aR)-6-[3'iodo-1'-(4-methoxybenzyloxy)prop-2'-en-1'-yl]-3a-(4-methoxybenzyloxymethyl)-2-phenyl-6,6a-dihydro-3aH-furo[3,4-d]oxazol-4-one

methyl 2-benzamido-3-(dimethylphenylsilyl)propanoic acid

2-phenyl-4-(dimethylphenylsilyl)methyl-4,5-dihydro-5-oxazolone

(1'S,6R,3aS,6aR)-6-[2'-hydroxy-1'-(4-methoxybenzyloxy)ethyl]-3a-(4-methoxybenzyloxymethyl)-2-phenyl-6,6a-dihydro-3aH-furo[3,4-d]oxazol-4-one

(1'S,3S,4S,5S)-3-benzamido-3-hydroxymethyl-4-acetoxy-5-[2'-(t-butyldiphenylsilyloxy)-1'-hydroxyethyl]oxolan-2-one