6'-Bromo-7'-fluorospiro[cyclopropane-1,3'-indolin]-2'-one
4-(Cyclopropylmethyl)-1-oxa-4,9-diazaspiro[5.5]undecan-3-one
tert-Butyl 9-cyano-3-azaspiro[5.5]undecane-3-carboxylate
4-(3-Fluorobenzyl)-1-oxa-4,9-diazaspiro[5.5]undecan-3-one
tert-Butyl 7-bromo-2-oxospiro[indoline-3,4'-piperidine]-1'-carboxylate
6'-(Diethylamino)-1',3'-dimethyl-3H-spiro[isobenzofuran-1,9'-xanthen]-3-one
4-(4-Fluorobenzyl)-1-oxa-4,9-diazaspiro[5.5]undecan-3-one