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 => protoaustinoid b + ah2 + o2