Answer:

The active substance in Trecondi, treosulfan, belongs to a group of drugs called alkylating agents. In the body, treosulfan is converted into other compounds called epoxides, which can kill cells, especially rapidly developing cells such as bone marrow cells. The epoxides work by attaching to the DNA of dividing cells. By doing this, Trecondi can kill the cells in the patient’s bone marrow and make space for new cells from a donor.