(5R)-tert-butoxycarbonylamino-(4R)-[hydroxy-(2,4-dimethoxybenzyl)-amino]-(6S)-methoxy-(6S)-methylnon-2-ynoic acid ethyl ester
{(2S)-methoxy-(1R)-[1-(2,4-dimethoxy)-benzyl-5-oxo-(3S)-Z-propenylpyrrolidin-(2R)-yl]-(2S)-methylpentyl}-carbamic acid tert-butyl ester
(5R)-tert-butoxycarbonylamino-(4R)-[hydroxy-(4-methoxybenzyl)-amino]-(6S)-methoxy-(6S)-methylnon-2-ynoic acid tert-butyl ester
(5R)-tert-butoxycarbonylamino-(4R)-[hydroxy-(4-methoxybenzyl)-amino]-(6S)-methoxy-(6S)-methylnon-2-ynoic acid ethyl ester
N-{(2S)-methoxy-(1R)-[1-(2,4-dimethoxybenzyl)-5-oxo-(3S)-Z-propenylpyrrolidin-(2R)-yl]-(2S)-methylpentyl}-acetamide