3-(2,2,2-trimethylhydrazine)propionate [ 3-(2,2,2-trimethylhydrazinium)propionate,3-TMHP,MET-88,N-trimethylhydrazine-3-propionate,Q-4224-IOS,Quaterin,mildronat,mildronate,mindronate,trimethylhydraziniumpropionate ] structural analog of gamma-butyrobetaine, also of carnitine; antianginal compound; MET-88 is dihydrate; structure given in first source