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**Molecular formula:** C₅H₆N₂O₂
**Molar mass:** 126,11 g/mol
**Information:** Thymine is a heterocyclic nitrogen compound together with uracil and cytosine among pyrimidine nucleobases. It is complementary to adenine (DNA), with which it forms two hydrogen bonds.
**Use:** Nucleobases deliver nucleic acids the ability to store and transmit genetic information.
**Appearance:** It is the basis of nucleic acids (DNA only).