The term controlled substance is identified in base64 scheme by the sequence Y29udHJvbGxlZCBzdWJzdGFuY2U=, while the MD5 signature is equal to c9646360852bac59acfcb8102c645164. The ASCII encoding of controlled substance in hexadecimal notation is 636f6e74726f6c6c6564207375627374616e6365.