“…A cyclic hydroxamic acid, 2,4-dihydroxy-2H,1,4-benzoxazin-3(4H)-one (DIBOA, 1), was reported recently to inhibit growth of the DU-145 human prostate cancer cell line [1,2]. DIBOA (1) was isolated from the water-soluble fraction of the pollen extract, cernilton, which has been shown to cause symptomatic improvement in patients with benign prostatic hyperplasia, chronic prostatitis, and prostatodynia [3,4].…”