Chemical Name: 3-Hydroxy-4-methylthiophen-2(5H)-one (as per EP & USP)
Synonym: Cefalexin EP Impurity D
Smiles: O=C1C(O)=C(C)CS1
Stability indicating RP - HPLC method for combination of ambroxol hydrochloride and cefadroxil monohydrate in pharmaceutical formulation
By Goswami, J. A.; Shah, N. J.
From International Journal of Pharmaceutical Sciences and Research (2017), 8(3), 1220-1228
Method development & comparative statistical evaluation of HPLC & HPTLC method for simultaneous estimation of cefadroxil monohydrate & ambroxol hydrochloride
By Dhoka, Madhura V.; Chopade, Shakuntala S.
From Indo Global Journal of Pharmaceutical Sciences (2012), 2(2), 203-212