The inhibitory effect on growth of breast cancer xenograft in nude mice was 95% for CM-1-PYM conjugate and 58%for free drug.

• CM－1－药物（平阳霉素；PYM）偶联物对裸鼠移植乳腺癌生长的抑瘤率为95%25，而同等剂量的游离药物为58%25。