label: 3-methoxy-4',5-dihydroxy-trans-stilbene + S-adenosyl-L-methionine <=> pterostilbene + S-adenosyl-L-homocysteine + H(+)
label_lc: 3-methoxy-4',5-dihydroxy-trans-stilbene + s-adenosyl-l-methionine <=> pterostilbene + s-adenosyl-l-homocysteine + h(+)