(3R,4R,5R)-ethyl 4-acetamido-5-(methoxymethoxy)-3-(pentan-3-yloxy)cyclohex-1-enecarboxylate

(3aR,7R,7aS)-ethyl 2,2-diethyl-7-(methoxymethoxy)-3a,6,7,7a-tetrahydrobenzo[d][1,3]dioxole-5-carboxylate

二乙基酮

(3R,4S,5S)-5-tert-butoxycarbonylamino-3-(1-ethylpropoxy)-4-hydroxycyclohex-1-enecarboxylic acid ethyl ester

(3R,4S,5S)-5-tert-butoxycarbonylamino-3-(1-ethylpropoxy)-4-trifluoromethanesulfonyloxycyclohex-1-enecarboxylic acid ethyl ester