methyl (4S,5R)-1-tert-butoxycarbonyl-4-tert-butyldimethylsilyloxy-5-(2-methylprop-2-en-1-yl)-L-prolinate

methyl (4S,5R)-1-tert-butoxycarbonyl-4-tert-butyldimethylsilyloxy-5-[(N-methoxy-N-methylcarbonyl)methyl]-L-prolinate

3-(2-氧代丙基)-4(3H)-喹唑啉酮

(3S)-2,3-diacetoxy-N-benzyloxycarbonylpiperidine

(S)-(+)-5-氧代-2-四氢呋喃羧酸