(R)-1-Boc-3-methyl-piperazine
(R)-1-Boc-3-methyl-piperazine (Compound I3-1) is an intermediate. (R)-1-Boc-3-methyl-piperazine can be used in the preparation of Compound I3. Compound I3 has anticancer effects against BRCA2 gene-deficient colorectal adenocarcinoma.