label: 2-heptyl-1-hydroxy-4(1H)-quinolinone + S-adenosyl-L-methionine => 2-heptyl-1-methoxy-4(1H)-quinolinone + S-adenosyl-L-homocysteine + H(+)
label_lc: 2-heptyl-1-hydroxy-4(1h)-quinolinone + s-adenosyl-l-methionine => 2-heptyl-1-methoxy-4(1h)-quinolinone + s-adenosyl-l-homocysteine + h(+)