The present disclosure relates to compounds of the formula (I) which are precursor compounds of esters, whereby upon hydrolysis of the precursor compound, an ester compound is released. This ester precursor approach can be useful for applications where controlled release of, for example, ethyl formate, is beneficial.

##STR00001##

The present disclosure relates to compounds of the formula (I) which are precursor compounds of esters, whereby upon hydrolysis of the precursor compound, an ester compound is released. This ester precursor approach can be useful for applications where controlled release of, for example, ethyl formate, is beneficial.

##STR00001##

The invention is directed to 2-aryl hydrazonopropanals that exert anti-tumor activity and methods for using them to prevent, inhibit and treat cancer. It also involves anti-tumor compositions containing these 2-aryl hydrazonopropanals, and methods of treatment using these compositions.

The invention is directed to 2-aryl hydrazonopropanals that exert anti-tumor activity and methods for using them to prevent, inhibit and treat cancer. It also involves anti-tumor compositions containing these 2-aryl hydrazonopropanals, and methods of treatment using these compositions.