The term unsaturated fatty acid is identified in base64 scheme by the sequence dW5zYXR1cmF0ZWQgZmF0dHkgYWNpZA==, while the MD5 signature is equal to c6d1b06af32ae5e0f3cb20d61517acf3. The ASCII encoding of unsaturated fatty acid in hexadecimal notation is 756e7361747572617465642066617474792061636964.