683 Addendum 



471a Norlobaridone, C.-jHonOe, colorless crystals, m.p. 188-190°. 



CH3CH,CH,CH:CO ^^^ 



COO OH 



HO O I 



CH,CH.CH,CHoCH3 



A yield of 2.2% was obtained from Pannelia conspersa. 

 The structure of nidulin (and thus of nornidulin) has 

 been completed.^''' It is: 



^^' COO ^^' OCH3 



The chemistry of the uncommon 1-methyIpropenyl sub- 

 stituent is greatly modified by the neighboring chlorine 

 atom. 



12. Quinones and Related Compounds 



a. BENZOQUINONES 



The growth of a mycobacterium was stimulated by 

 coenzyme Qio which suggests a possible role in energy 

 metabolism.*^" 



b. NAPHTHOQUINONES 



A variety of bacteria (Bacillus cereus, B. subtilis, Pro- 

 teus vulgaris, Sarcina flava. Staphylococcus aureus, My- 

 cobacterium phlei, Pseudomonas spp., Azotobacter vine- 

 landii, Nocardia sp.) were examined for vitamin K 

 content.^^ Three types were identified. Vitamin K^ was 



*»" F. M. Dean, D. S. Deorha, A. D. T. Erni, D. W. Hughes and 

 John C. Roberts, /. Chem. Soc, 4829 (1960). 



•"' James O. Norman and Robert P. Williams, Biochem. and 

 Biophys. Res. Comms. 2 372 (1960). 



»i Bodil Kruse Jacobsen and Hendrik Dam, Biochim. et Biophys. 

 Acta 40 211 (1960). 



