label: (E)-4-coumarate + S-adenosyl-L-methionine => (E)-4-coumaric acid methyl ester + S-adenosyl-L-homocysteine
label_lc: (e)-4-coumarate + s-adenosyl-l-methionine => (e)-4-coumaric acid methyl ester + s-adenosyl-l-homocysteine