7-Methylguanosine (m7G) is a modified purine nucleoside.

It is a methylated version of guanosine and when found in human urine, it may be a biomarker of some types of cancer.

In the RNAs, 7-methylguanosine have been used to study and examine the reaction evolving methylguanosine.

It also plays a role in mRNA as a blocking group at its 5´-end.

This article about an organic compound is a stub.