3,6,8-Tribromo-dibenzo[1,4]dioxin-1-ol 3,6,8-tribromooxanthren-1-ol InChI=1/C12H5Br3O3/c13-5-1-7(15)11-9(3-5)18-12-8(16)2-6(14)4-10(12)17-11/h1-4,16 Spongiadioxin C dibenzo[b,e][1,4]dioxin-1-ol, 3,6,8-tribromo-