label: N(7)-methylguanosine(46) in tRNA + S-adenosyl-L-homocysteine => guanosine(46) in tRNA + S-adenosyl-L-methionine
label_lc: n(7)-methylguanosine(46) in trna + s-adenosyl-l-homocysteine => guanosine(46) in trna + s-adenosyl-l-methionine