Phenylephrine Bitartrate Standard

(R)-Phenylephrine Bitartrate; Benzenemethanol, 3-hydroxy-α-[(methylamino)methyl]-, (R)-, [R-(R*,R*)]-2,3-dihydroxybutanedioate; Benzenemethanol, 3-hydroxy-α-[(methylamino)methyl]-, (R)-, (2R,3R)-2,3-dihydroxybutanedioate;