PD 116152 is a phenazine Antibiotic with antimicrobial and antitumor activity. PD 116152 possesses cytotoxic activity against L1210 lymphocytic leukemia and human colon adenocarcinoma (HCT-8) cells with IC 50 values of 5.2 x 10 -7 M and 7.1 x 10 -7 M, respectively. PD 116152 is promising for research of P388 lymphocytic leukemia.