protoaustinoid B + AH2 + O2 <=> preaustinoid A + A + H2O
protoaustinoid b + ah2 + o2 <=> preaustinoid a + a + h2o
protoaustinoid B + AH2 + O2 <=> preaustinoid A + A + H2O
protoaustinoid b + ah2 + o2 <=> preaustinoid a + a + h2o