preferred_name: precorrin-4 + S-adenosyl-L-methionine <=> precorrin-5 + S-adenosyl-L-homocysteine
preferred_name_lc: precorrin-4 + s-adenosyl-l-methionine <=> precorrin-5 + s-adenosyl-l-homocysteine
label: precorrin-4 + S-adenosyl-L-methionine <=> precorrin-5 + S-adenosyl-L-homocysteine
label_lc: precorrin-4 + s-adenosyl-l-methionine <=> precorrin-5 + s-adenosyl-l-homocysteine