(R)-2-Methoxycarbonylamino-2-(6-methoxy-1-oxo-1,3-dihydro-isoindol-2-ylmethyl)-4-(4-sulfo-phenyl)-but-3-ynoic acid methyl ester
(R)-2-Methoxycarbonylamino-2-(6-methoxy-1-oxo-1,3-dihydro-isoindol-2-ylmethyl)-4-(7-methyl-3H-imidazo[4,5-b]pyridin-6-yl)-but-3-ynoic acid methyl ester
methyl 1-<(trimethylsilyl)ethynyl>-N-carbomethoxyglycinate
3-Cyclohexyl-2-methoxycarbonylamino-4-methyl-pent-4-enoic acid methyl ester
3,3-Difluoro-2-methoxycarbonylamino-4-oxo-4-phenyl-butyric acid methyl ester