precorrin-6B + 2 S-adenosyl-L-methionine = precorrin-8X + 2 S-adenosyl-L-homocysteine + CO2 + 3 H(+)
precorrin-6b + 2 s-adenosyl-l-methionine = precorrin-8x + 2 s-adenosyl-l-homocysteine + co2 + 3 h(+)
precorrin-6B + 2 S-adenosyl-L-methionine = precorrin-8X + 2 S-adenosyl-L-homocysteine + CO2 + 3 H(+)
precorrin-6b + 2 s-adenosyl-l-methionine = precorrin-8x + 2 s-adenosyl-l-homocysteine + co2 + 3 h(+)