The term oxidation-reduction indicator is identified in base64 scheme by the sequence b3hpZGF0aW9uLXJlZHVjdGlvbiBpbmRpY2F0b3I=, while the MD5 signature is equal to 27a5f49eb43362ab8a7c4f65e082e7f6. The ASCII encoding of oxidation-reduction indicator in hexadecimal notation is 6f7869646174696f6e2d726564756374696f6e20696e64696361746f72.