4-(二甲基氨基)-2,3,4-三甲基-2-环戊烯-1-酮

2,2-diethoxy-1-methylpyrrolidine

ethyl 4-chlorobenzenecarboximidate

2,6-diethoxy-4,8-diphenyl-1,3,5,7-tetrazocine

5-ethoxy-3-(furan-2-yl)-3,4-dihydro-2H-pyrrole