122825-66-5
2',3,4'''-tri-O-acetyl-4''-O-isovaleryltylosin
→
122825-72-3
2',3-di-O-acetyl-4'''-deoxy-4''-O-isovaleryl-4'''-oxotylosin
122825-65-4
2',4'''-di-O-acetyl-4''-O-isovaleryltylosin