The term amphetamine sulfate is identified in base64 scheme by the sequence YW1waGV0YW1pbmUgc3VsZmF0ZQ==, while the MD5 signature is equal to feb422a44ebc2b094a1809f8983a3ef4. The ASCII encoding of amphetamine sulfate in hexadecimal notation is 616d70686574616d696e652073756c66617465.