Chemistry of Heterocyclic Compounds, Vol. 38, No. 2, 2002 ... MM Krayushkin1, FM Stoyanovich1, O. Yu. Zolotarskaya1, EI Chernoburova1, ... NN Makhova1, VN Yarovenko1, IV Zavarzin1, A. Yu. Martynkin1, and BM Uzhinov2 ... Photochromic derivatives of 5-alkyl-2-(1,3 ,4-oxadiazol-2-yl)thiophenes have been synthesized for the first time. Their photochromic and fluorescent properties have been studied. ... Keywords: benzothiazoles, 1,2- ...