The term phthalic anhydride is identified in base64 scheme by the sequence cGh0aGFsaWMgYW5oeWRyaWRl, while the MD5 signature is equal to 4d5da1877b609bf33239a9934bd80571. The ASCII encoding of phthalic anhydride in hexadecimal notation is 70687468616c696320616e68796472696465.