1-Propanamine, N,N-dimethyl-3-(4H-thieno(2,3-b)(1)benzothiopyran-4-ylidene)-, (R-(R*,R*))-2,3-dihydroxybutanedioate, hydrate (1:1:2) 4-(3-Dimethylaminopropylidene)thieno(2,3-b)-1-benzothiopyran hydrogen tartrate dihydrate 55407-80-2