| Sr.No. | Chemical Name | CAS No. | Used for |
| Tolterodine Tartrate | |||
| 1 | 6-methyl-4-phenyl-2-chromanone | 40546-94-9 | – |
| 2 | 3-(2-methoxy-5-methyl phenyl)-3-phenyl propan-1-ol | 124937-73-1 | – |
| 3 | 3-phenyl-3-(2-hydroxy-5-methyl phenyl) propanol | 851789-43-0 | – |
| 4 | Rac Desisopropyl Tolterodine
(4-Methyl-2-[3-[(1-methylethyl)amino]-1-phenylpropyl]phenol; N-Isopropyl-3-(2-hydroxy-5-methylphenyl)-3-phenylpropylamine) |
480432-14-2 | – |
| 5 | Tolterodine Monoisopropyl Methoxy Analog Racemate
(2-[3-(Isopropylamino)-1-phenylpropyl]-4-methylphenyl methyl ether hydrochloride) |
1391053-65-8 | Imp D as per EP |
| 6 | Tolterodine (S)-Isomer
((S)-2-(3-(diisopropylamino)-1-phenylpropyl)-4-methylphenol; Phenol, 2-[3-[bis(1-methylethyl)amino]-1-phenylpropyl]-4-methyl) |
124937-53-7 | Imp F as per EP |
| 7 | (R)-Desisopropyl Tolterodine
((R)-3-(2-hydroxy-5-methylphenyl)-N,N-diisopropyl-3-phenylpropan-1-amine oxide) |
194482-41-2 | Imp G as per EP |
| 8 | N,N-diisopropyl-3-(2-methoxy-5-methylphenyl)-3-phenylpropan-1-amine | 124935-88-2 | Imp C as per EP |
| 9 | rac-6-Methyl-4-phenyl-2-chromanol | 209747-04-6 | Lactol Impurity |
