英文别名Alanine, N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-histidyl-2-methyl; Semaglutide impurity 103; 2-[(2S)-2-({[(9H-fluoren-9-yl)methoxy]carbonyl}amino)-3-(1H-imidazol-5-yl)propanamido]-2-methylpropanoic acid; 2-[[(2S)-2-(9H-fluoren-9-ylmethoxycarbonylamino)-3-(1H-imidazol-5-yl)propanoyl]amino]-2-methylpropanoic acid