1.1.1.252 5.5 - reduction of 1,3,6,8-tetrahydroxynaphthalene 9575 1.1.1.252 7 - assay at 685550 1.1.1.252 7.5 - oxidation of scytalone 9575 1.1.1.252 8 9 optimal pH for oxidation of 2,3-dihydro-2,5-dihydroxy-4H-benzopyran-4-one 697279