| abstract |
The invention provides the L-valinate ester of a hydroxypropylthiazolidine carboxamide derivative of formula (I), (2S)-3-([1,1'-biphenyl]-4-ylsulfonyl)-N-[(1S)-3-hydroxy-1- phenylpropyl]-1,3-thiazolidine-2- carboxamide, as well as salts and crystal polymorphs thereof. The compound inhibits the prostaglandin F receptor (PGF2alpha) and is useful in the treatment of disorders such as preterm labor at the early gestational stage or dysmennorrhea. |