ethyl 4,5-dimethyl-1,3-thiazole-2-carboxylate

2-ethoxy-5,6-dihydro-4H-1,3-oxazine

2-bromo-1-ethoxy-7-phenylcyclohepta-1,3,5-triene

2-chloro-1-ethoxy-7-phenylcyclohepta-1,3,5-triene

1-ethoxy-2,7-diphenylcyclohepta-1,3,5-triene