... 1982 Pergamon Press Ltd. STRUCTUi~ OF PHASEOLI}!ONE, A NOVEL PHYTOTOXIH FRO~I ~iACROPHO~dl NA PH~EOLINA Tarun K. Dhar, Kazi AoI. Siddiqui and Esahak All Indian Institute of Chemical Biology, Calcutta 700032, India Abstract: Structure of phaseolinone, a phytotoxin isolated from the funjus Macrophomina phaseolina (Tassi) Gold, has been established as ~o ...