Acknowledgment 



A COMPILATION of this soit was suggested by Dr. Ernest M. 

 Weber in 1956, and the first draft was issued as an intra- 

 company report the following year. Later, publication was sug- 

 gested by Dr. Gilbert M. Shull and urged by a number of uni- 

 versity people interested in microbial metabolites. 



Most importantly, publication would not have been possible 

 without the consent and support of Dr. Karl J. Brunings and 

 Dr. I. A. Solomons. Other staff members of the Pfizer Medical 

 Research Laboratories have also been very cooperative. Dr. 

 Frank A. Hochstein has been most helpful throughout the prepa- 

 ration for publication, and I wish to thank him especially as 

 well as Dr. Walter D. Celmer for reading the manuscript at an 

 early stage and for their comments on the chapter on macrolide 

 antibiotics. 



In addition. Dr. Francis X. Murphy read the entire galley 

 proof and made many constructive suggestions. 



Several other authorities have been kind enough to review 

 their specialties. Professor Hans Brockmann of Gottingen con- 

 tributed information on the actinomycins; Professor Konrad 

 Bloch of Harvard read the sections dealing with lipides; Dr. 

 T. G. Halsall of Oxford reviewed fungal steroids; Dr. Herchel 

 Smith of Manchester, sections concerned with the biosynthesis 

 of various mold metabolites; Professor F. G. Holliman of Cape- 

 town, the section on phenazines; Dr. J. D. Bu'Lock of Man- 

 chester, the section on acetylenic substances; and Dr. Edward 

 Borowsky of the Institut Medycyny Moskiej, Gdansk, the sec- 



