Waisser, Karel: Modification of the structure of 3-phenyl-2H-1,3-benzoxazine-2,4(3H)-diones: 3-phenyl-4-thioxo-2H-1,3-benzoxazine-2(3H)-ones and 3-phenyl-2H-1,3-benzoxazine-2,4(3H)-dithiones : 2nd European Symposium on Antimicrobial Agents, Hradec Králové, July 1-4, 1998. Abstracts