1 QQH [(3~{R})-3-carboxy-7-[(2,3-dimethylphenyl)methyl]-5-oxidanylidene-2,3-dihydro-[1,3]thiazolo[3,2-a]pyridin-8-yl]-dimethyl-azanium 1.000 2 BYK [(3~{R})-3-carboxy-7-(naphthalen-1-ylmethyl)-5-oxidanylidene-2,3-dihydro-[1,3]thiazolo[3,2-a]pyridin-8-yl]-dimethyl-azanium 0.793 3 C8N [(3~{S})-3-carboxy-7-(naphthalen-1-ylmethyl)-5-oxidanylidene-2,3-dihydro-[1,3]thiazolo[3,2-a]pyridin-8-yl]-dimethyl-azanium 0.793 4 C2Q [(3~{R})-3-carboxy-7-[(4-methylnaphthalen-1-yl)methyl]-5-oxidanylidene-2,3-dihydro-[1,3]thiazolo[3,2-a]pyridin-8-yl]-dimethyl-azanium 0.767