[A new antibiotic, corallomycin, from an Act. longispororuber].

A new antibiotic named corralomycin (C34H28O9) was isolated from the mycelium of culture 6795-38 classified as belonging to Act. longispororuber. The maximum UV absorption spectra of the antibiotic in an alcohol solution were observed at the wavelengths of 228, 268 and 420 nm, the absorption bonds of 3400, 2980, 2865, 1710, 1625, 1595, 1165, 880 and 780 cm(-1) were recorded in the IR spectrum. Two acetyl derivatives of corallomycin, i.e. diacetate (C38H32O11) and tetraacetate (C42H36O13) were prepared.