ID 1.1.1.199 DE (S)-usnate reductase. CA (6R)-2-acetyl-6-(3-acetyl-2,4,6-trihydroxy-5-methylphenyl)-3-hydroxy-6- CA methylcyclohexa-2,4-dien-1-one + NAD(+) = (S)-usnate + 2 H(+) + NADH. //