Ixazomib is a medication used to treat multiple myeloma, a type of blood cancer. The stable isotopes of ixazomib are non-radioactive forms of the drug that can be used for research purposes. These isotopes have the same chemical and physical properties as the regular drug, but allow for more precise analysis and tracking of the drug's effects in the body. The use of stable isotopes can lead to a better understanding of ixazomib's mechanism of action and potential side effects.