chromatographic evidence for the bioconversion of ( methyl-14c ) -gentamicin a to a radioactive sisomicin-like product ( possibly ( 3 '' -n-methyl-14c ) -sisomicin ) was seen , when a micromonospora blocked mutant was incubated in the presence of the former antibiotic .
C0017436
gentamicin
C0037209
sisomicin