70? Addendum 



L-leucine anhydride, L-prolyl-L-valine anhydride and an 

 apparently new diketopiperazine, L-prolyl-L-phenylalanine 

 anhydride (compound E) Ci^Hi.jO.jN.j, m.p. 127-128°, 

 [a]..-'" —99.8" (c 1.0 in ethanol). A crystalline wax, m.p. 

 52°, was isolated from the same culture and assumed to 

 be n-pentacosane, Co-H-.o. Also an uncharacterized sub- 

 stance, white needles, m.p. 206-208°, called rosellinic 

 acid was isolated. 



L-Prolyl-L-valine anhydride had been isolated previously 

 from a streptomycete culture.-^" L-Prolyl-L-leucine anhy- 

 dride had been isolated both from a streptomycete and 

 from Aspergillus funiigatus.'^^ 



Muta-aspergillic acid, C11H18O3N2, pale yellow needles, 

 m.p. 173° (dec.) (subl.) with alternative structures: 



has been reported.-"' 



/. PHENAZINES AND PHENOXAZONES 



Three new natural phenazines have been reported. ^^^ 



984b l-Hydroxymethyl-6-carboxyphenazine, C15H12O3N2, light yellow 

 crystals, m.p. 197-201°. 



HOOC 



I 



.V 



CH2OH 



210 Y. Koaze, ibid. 22 98 (1958). 



-" J. L. Johnson, W. G. Jackson and T. E. Elbe, ] . Avn. Chem. Soc. 

 73 2947 (1951). 



2"' Seiji Nakamura, Bull. Agr. Chem. Soc. (Japan) 24 629 (1960). 

 2i2Koki Yaglshita, J. Antibiotics (Japan) 13A 83 (1960). 



