label: (S)-usnate reductase activity
label_lc: (s)-usnate reductase activity
description: "Catalysis of the reaction: (6R)-2-acetyl-6-(3-acetyl-2,4,6-trihydroxy-5-methylphenyl)-3-hydroxy-6-methylcyclohexa-2,4-dien-1-one + NAD+ = (S)-usnate + 2 H+ + NADH."