21-O-acetyl-isomeliandiol + A <=> (21S)-21-acetoxyl-apo-melianone + AH2
21-o-acetyl-isomeliandiol + a <=> (21s)-21-acetoxyl-apo-melianone + ah2
21-O-acetyl-isomeliandiol + A <=> (21S)-21-acetoxyl-apo-melianone + AH2
21-o-acetyl-isomeliandiol + a <=> (21s)-21-acetoxyl-apo-melianone + ah2