Patent ID: 7232837

Claim:
A stereoscopically-pure diastereomer of Formula I: wherein: R 1 is pyridine which may be substituted with hydrogen, lower alkyl, lower alkylenearyl, lower alkylenephenyl, lower alkylenehydroxyphenyl, lower alkyleneamine, lower alkyleneaminoaryl, or lower alkylaminohydroxyphenyl; R 2 , R 3 and R 4 are independently H, OH, CH 2 OH, NHCONH 2 , or NH 2 ; wherein R 2 , R 3 and R 4 are not all H; and with the proviso that the stereoisomer is not (−)-phenylpropanolamine, (−)-phenylephrine or (−)-ephedrine.