2H-1,4-Benzoxazin-3(4H)-one, 2,4-dihydroxy- ,its CAS NO. is 17359-54-5,the synonyms is 2,4-Dihydroxy-1,4-benzoxazinone ; 2,4-Dihydroxy-2H-1,4-benzoxazin-3(4H)-one ; BRN 1077308 ; DIBOA .