rac Metoprolol-d7 (±)-Metoprolol-(isopropyl-d7) (+)-tartrate salt (±)-Metoprolol-(isopropyl-d7) hemi-(+)-tartrate salt 1-[4-(2-Methoxyethyl)phenoxy]-3-[(1-methylethyl-d7)amino]-2-propano 1-[4-(2-Methoxyethyl)phenoxy]-3-[(1-methylethyl-d7)amino]-2-propanol