Catalyzes the conversion of 1-deoxypentalenic acid to pentalenic acid in the biosynthesis of neopentalenolactone antibiotic. 1-deoxypentalenate + 2 H(+) + O2 + reduced 2[4Fe-4S]-[ferredoxin] = H2O + oxidized 2[4Fe-4S]-[ferredoxin] + pentalenate Antibiotic biosynthesis; neopentalenolactone biosynthesis. S.avermitilis does not produce pentalenolactone itself in vivo but instead a group of new metabolites that are neopentalenolactone derivatives. Belongs to the cytochrome P450 family.