(1R,2'S,6S,9a'S)-6-(benzyloxymethyl)-2'-((triisopropylsilyloxy)methyl)-6',7',8',9a'-tetrahydro-2'H-spiro[cyclohex[3]ene-1,9'-pyrido[2,1-b][1,3]oxazin]-4'(3'H)-one

((1R,6S)-6-benzyloxymethyl-cyclohex-3-enyl)-methanol

methyl (1R,6S)-6-(benzyloxymethyl)cyclohex-3-enecarboxylate

(1R,2S)-[2-[(acetyloxy)methyl]cyclohex-4-en-1-yl]methyl acetate