preferred_name: precorrin-1 + S-adenosyl-L-methionine <=> precorrin-2 + S-adenosyl-L-homocysteine
preferred_name_lc: precorrin-1 + s-adenosyl-l-methionine <=> precorrin-2 + s-adenosyl-l-homocysteine
label: precorrin-1 + S-adenosyl-L-methionine <=> precorrin-2 + S-adenosyl-L-homocysteine
label_lc: precorrin-1 + s-adenosyl-l-methionine <=> precorrin-2 + s-adenosyl-l-homocysteine