Other pertinent experimental details for the aldehyde and derivative preparations are given as footnotes to Table I. The compounds were dried at 150" (1 mm.) for 8 hr. prior to analysis. In addition to the derivatives listed in the Tables a few other were prepared for which nonconfirmatory nitrogen analyses were obtained. Acknowledgment.-The authors wish to acknowledge partial support of this research through grant C-2457 from the Kational Cancer Institute of the National ...