h phosphate and groups wherein or 2 and or 3 form esters of amino acids or proteins with the proviso that all of r 1 r 2 and r 3 are not h in groups wherein or 1 form a substituted or unsubstituted glycolamide ester r 1 can be u2014 ch 2 conr 4 r 5 wherein r 4 and r 5 may be the same or different and are independently selected from the group consisting of h oh substituted and unsubstituted alkyl groups u2014 ch 2 m ch 3 u2014 ch 2 oh and u2014 ch 2 ch 2 n oh with the proviso that m is 0 1 2 3 or 4 and n is 0 1 2 3 or 4 in other methods of inducing vasodilation or treating hypertension r 1 can be a c 1 c 4 alkyl group such as methyl ethyl propyl or butyl in other methods r 1 is a substituted or unsubstituted benzyl groups such as u2014 ch 2 c 6 h 5 u2014 ch 2 c 6 h 4 no 2 u2014 ch 2 c 6 h 4 och 3 u2014 ch 2 c 6 h 4 cl u2014 ch 2 c 6 h 4 no 2 2 or u2014 ch 2 c 6 h 4 f the benzyl group can be ortho meta para ortho para substituted and combinations thereof suitable substituents on the aromatic ring include halogens fluorine chlorine bromine iodine u2014 no 2 groups u2014 or 16 groups wherein r 16 is h.