| abstract |
The present invention relates to an immunoconjugate of the formula: , or a pharmaceutically acceptable salt thereof, wherein the subscript r is an integer from 1 to 10, the subscript n is an integer from about 2 to about 25, and "Ab" has an antigen binding domain that binds to HER2. antibody constructs. The present invention further provides compositions comprising the immunoconjugates and methods of treating cancer with the immunoconjugates. |