6-O-Methylerythromycin & 5,6,9,17,19,21-Hexahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-8-[N-(4-methyl-1-piperazinyl)formimidoyl]-2,7-(epoxypentadeca-[1,11,13]trienimino)naphtho[2,1-b]furan- AIDS-008536 AIDS008536 Clarithromycin & Rifampin