It is produced by the strain of Pseudomonas sp. QN05727. It's an anti-tumor antibiotic. It can selectively inhibit the growth of 3Y1 in rat fibroblasts with degeneration of various tumor genes. It inhibits v-H-ras-3Y1, v-src-3Y1 cells and the normal 3Y1 cells with IC50 (nmol/L) of 14, 4.5 and 140, respectively. It stops RAS-or SRC-denatured cells at G1 phase of the cell cycle and increases p21WAF1 expression.