Guanosine monophosphate

Guanosine monophosphate, also known as 5'-guanidylic acid or guanylic acid and abbreviated GMP, is a nucleotide that is found in RNA. It is an ester of phosphoric acid with the nucleoside guanosine. GMP consists of the phosphate group, the pentose sugar ribose, and the nucleobase guanine.

The sodium salt, disodium guanylate is a food additive used as a flavor enhancer because of its distinctive meaty taste.