The term photochemical reaction is identified in base64 scheme by the sequence cGhvdG9jaGVtaWNhbCByZWFjdGlvbg==, while the MD5 signature is equal to cbae43e0171a0f6e5e7055a339f33aa7. The ASCII encoding of photochemical reaction in hexadecimal notation is 70686f746f6368656d6963616c207265616374696f6e.