Thiophene-2-acetic acid
Thiophene-2-acetic acid is the organosulfur compound with the formula HO2CCH2C4H3S. Together with thiophene-3-acetic acid, it is one of two isomeric thiophene acetic acids. Preparation and use
It is prepared from 2-acetylthiophene. It is a precursor to the antibiotics cephaloridine and cephalothin. References

Thiophenes
Carboxylic acids