| • | Arjunolic acid (CAS: 465-00-9) | • | Armillarisin A (CAS: 53696-74-5) | • | Armodafinil IHS (CAS: 112111-43-0) |
| • | Arotinolol (CAS: 68377-92-4) | • | Arotinolol hydrochloride (CAS: 68377-91-3) | • | Arprinocide (CAS: 55779-18-5) |
| • | Arsanilic Acid (CAS: 98-50-0) | • | Arsenic Metal (CAS: 7440-38-2) | • | Arsenic Trioxide (CAS: 1327-53-3) |
| • | Artemether (CAS: 71963-77-4) | • | Artemisic acid (CAS: 80286-58-4) | • | Artemisinin (CAS: 63968-64-9) |
| • | Artesunate (CAS: 88495-63-0) | • | Articaine Hcl (CAS: 23964-58-1) | • | Articaine hydrochloride (CAS: 23964-57-0) |
| • | AS-252424 (CAS: 900515-16-4) | • | Ascomycin (CAS: 104987-12-4) | • | Ascorbyl palmitate (CAS: 137-66-6) |
| • | Asenapine (CAS: 65576-45-6) | • | Asenapine Maleate | • | Asiatic acid (CAS: 464-92-6) |
| • | Asiaticoside (CAS: 16830-15-2) | • | Asoxime dichloride (CAS: 34433-31-3) | • | Aspartame (CAS: 22839-47-0) |
| • | Aspartame acesulfame (CAS: 106372-55-8) | • | Aspartic Acid (CAS: 617-45-8) | • | Asperosaponin VI (CAS: 39524-08-8) |
| • | Aspirin (CAS: 50-78-2) | • | Aspirin DL-lysine (CAS: 62952-06-1) | • | Aspoxicillin (CAS: 63358-49-6) |
| • | Astaxanthin (CAS: 472-61-7) | • | Astemizole (CAS: 68844-77-9) | • | Astragalin (CAS: 480-10-4) |
| • | Astragaloside (CAS: 17429-69-5) | • | Astragaloside A (CAS: 83207-58-3) | • | Astragaloside I (CAS: 84680-75-1) |
| • | Astragaloside II (CAS: 84676-89-1) | • | Astragaloside IV (CAS: 84687-43-4) | • | Astrophloxine (CAS: 14696-39-0) |
| • | Asulam (CAS: 3337-71-1) | • | At-Tba (CAS: 86299-47-0) | • | AT9283 (CAS: 896466-04-9) |
| • | Ataluren (CAS: 775304-57-9) | • | Atazanavir (CAS: 198904-31-3) | • | Atazanavir sulfate (CAS: 229975-97-7) |
| • | Atenolol (CAS: 29122-68-7) | • | Atipamezole (CAS: 104054-27-5) | • | Atipamezole hydrochloride (CAS: 104075-48-1) |
| • | ATMP (CAS: 6419-19-8) | • | Atomoxetine hydrochloride (CAS: 82248-59-7) | • | Atorvastatin acetonide tert-butyl ester (CAS: 125971-95-1) |
| • | Atorvastatin hemicalcium salt (CAS: 134523-03-8) | • | Atorvastatin lactone (CAS: 125995-03-1) | • | Atorvastatin Methyl Ester |
| • | Atorvastatin Sodium (CAS: 134523-01-6) | • | Atorvastatin Tertiary Butyl Ester (CAS: 134395-00-9) | • | Atovaquone (CAS: 95233-18-4) |
| • | ATP disodium salt (CAS: 987-65-5) | • | Atractyloside A (CAS: 126054-77-1) | • | Atracurium Besilate (CAS: 64228-79-1) |
| • | Atracurium besylate (CAS: 64228-81-5) | • | Atranorin (CAS: 479-20-9) | • | Atraric acid (CAS: 4707-47-5) |
| • | Atrasentan (CAS: 173937-91-2) | • | Atrazine (CAS: 1912-24-9) | • | Atrazine-Desisopropyl-2-Hydroxy (CAS: 7313-54-4) |
| • | Atropic acid (CAS: 492-38-6) | • | Atropine (CAS: 51-55-8) | • | Atropine N-Oxide Hydrochloride (CAS: 4574-60-1) |
| • | Aucubin (CAS: 479-98-1) | • | Auramine hydrochloride (CAS: 2465-27-2) | • | Auranofin (CAS: 34031-32-8) |
| • | Auraptene (CAS: 495-2-3) | • | Aureusidin (CAS: 480-70-6) | • | Aurintricarboxylic acid (CAS: 4431-00-9) |
| • | Aurora 15227 (CAS: 27036-49-3) | • | Aurothioglucose (CAS: 12192-57-3) | • | Avagacestat (CAS: 1146699-66-2) |
| • | Avanafil (CAS: 330784-47-9) | • | Avasimibe (CAS: 166518-60-1) | • | Avermectin B1 (CAS: 71751-41-2) |
| • | Avermectin B1a (CAS: 65195-55-3) | • | Avermectin B1b (CAS: 65195-56-4) | • | Avizafone (CAS: 65617-86-9) |
| • | Avobenzone (CAS: 70356-09-1) | • | Avosentan (CAS: 290815-26-8) | • | Axitinib (CAS: 319460-85-0) |
| • | AZ960 (CAS: 905586-69-8) | • | Azaconazole (CAS: 60207-31-0) | • | Azacyclonol (CAS: 115-46-8) |
| • | Azadirachtin (CAS: 11141-17-6) | • | Azaleatin (CAS: 529-51-1) | • | Azamethiphos (CAS: 35575-96-3) |
| • | Azaperone (CAS: 1649-18-9) | • | Azapropazone (CAS: 13539-59-8) | • | Azaribine (CAS: 2169-64-4) |
| • | Azasetron hydrochloride (CAS: 123040-16-4) | • | Azathioprine (CAS: 446-86-6) | • | Azathramycin (CAS: 76801-85-9) |