label: 12-ethyl-8-propyl-3-vinylbacteriochlorophyllide d + S-adenosyl-L-methionine <=> 12-ethyl-8-isobutyl-3-vinylbacteriochlorophyllide d + S-adenosyl-L-homocysteine + H(+)
label_lc: 12-ethyl-8-propyl-3-vinylbacteriochlorophyllide d + s-adenosyl-l-methionine <=> 12-ethyl-8-isobutyl-3-vinylbacteriochlorophyllide d + s-adenosyl-l-homocysteine + h(+)