A novel fungitoxic compound, cepaciamide A, was isolated from Pseudomonas cepacia D-202. Its structure and stereochemistry were elucidated by the spectroscopic and synthetic methods.Pseudomonas cepacia D-202 has been recognized as a biological control agent against Botrytis cinerea and/or Penicillium expansurn, which causes beet roots rot in Japan.l In the investigatton of the fungitoxic compounds from P. cepacia D-202, we have isolated a series of biologically active phospholipids and piperidinone -containing lipids. We report here the isolation, structural identification and fungitoxic activity of a novel compound, cepaciamide A (1), from P. cepacia D-202.