(+)-(5S,6S)-5-(benzyloxy)-6-methyl-1,2,5,6-tetrahydro-2-pyridinone

(+)-(3R,4S)-1-(tert-butyloxycarbonyl)-3-benzyloxy-4-({[tert-butyl(diphenyl)silyl]oxy}methyl)-2-azetidinone