2,7-(Epoxypentadeca[1,11,13]trienimino)naphtho[2,1-b]furan-1,11(2H)-dione,5,6,17,19,21-pentahydroxy-23-methoxy-2,4,12,16,18,20,22-heptamethyl-,21-acetate (8CI); 2,7-(Epoxypentadeca[1,11,13]trienimino)naphtho[2,1-b]furan,rifamycin deriv.
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