Tosylhydrazone
A tosylhydrazone in organic chemistry is a functional group with the general structure RR'C=N-NH-Ts where Ts is a tosyl group. Organic compounds having this functional group can be accessed by reaction of an aldehyde or ketone with tosylhydrazine.
As an example camphor tosylhydrazone is synthesised by condensation of camphor and tosylhydrazine in ethanol with hydrochloric acid catalysis.