Pfizer Handbook of Microbial Metabolites 708 



985a l-Methoxy-4-methyl-9-carboxyphenazine, C16H14O3N2, yellow 

 needles, m.p. 124-126°. 



HOOC 



984a l-Methoxy-4-hydroxyniethyl-9-carboxyphenazine (Griseolutic 



Acid) C15H12O3N. 



CH2OH 



All of these compounds were Isolated from a culture of 

 Streptomyces griseoluteus. 



An unclassified streptomycete produced two substances 

 which were named questiomycins A and B.-^^ These 

 have been identified as : 



977a 6-Aminophenoxazone (Questiomycin A) CisHgOgNo, red crys- 

 tals, m.p. 241-244° (dec.) subl. from 150°. 



NH2 



o 



377a 2-Aminophenol (Questiomycin B), colorless crystals, m.p. 170- 

 175° (subl. 120°). 



NH2 



OH 



The suggestion was made that the aminophenol might be 

 the precursor of the aminophenoxazone. 



A purple and a yellow pigment isolated from Brevibac- 

 ^^^ Kentaro Anzai, Kiyoshi Isono, Kazuhiko Okuma and Saburo 

 Suzuki, ibid. 13A 125 (1960). 



