label: neomycin B + 5'-deoxyadenosine + L-methionine + A + H(+) => neomycin C + AH2 + S-adenosyl-L-methionine
label_lc: neomycin b + 5'-deoxyadenosine + l-methionine + a + h(+) => neomycin c + ah2 + s-adenosyl-l-methionine