16783-99-6 25-DA-3-(4-methyl-1-piperazinyl-iminomethyl)-rifamycin SV 25-Deacetyl-3-(4-methyl-1-piperazinyl-iminomethyl)-rifamycin SV AIDS-070669 AIDS070669 Rifamycin, 25-O-deacetyl-3-[(E)-[(4-methyl-1-piperazinyl)imino]methyl]-