| abstract |
Compounds of formula (I) used as therapeutic agents in which R2 and R3 are independently H, C1-C4 alkoxy or OH and (A, B) = (oxygen, oxygen) in which case either R or R1 is OH, halogen, secondary amino or tertiary amine while the other denotes NHCOR4, NHNHCOR5 or NHNHCOCONH2 or R and R1 together form =N-NH-CO-R'5, =N-NH-CO-CO-NH2, =N-NH-R6, =N-R7, =N-O-CO-R8 or =C(CH3)-NH-NH-CO-R9; or (A,B) = (N-NH-CX-NHR10, oxygen) in which case R and R1 together form =N-OH. |