label: 4alpha-carboxy-4beta-methyl-5alpha-cholest-7-ene-3beta-ol + NAD(+) => 4alpha-methyl-5alpha-cholest-7-en-3-one + CO2 + NADH
label_lc: 4alpha-carboxy-4beta-methyl-5alpha-cholest-7-ene-3beta-ol + nad(+) => 4alpha-methyl-5alpha-cholest-7-en-3-one + co2 + nadh