2-Brombenzothiophen-3-carbonsaeure 、 3,3-Dimethyl-7-(piperidin-4-yl)-2-oxa-7-azaspiro[4.5]decan-1-one dihydrochloride 以obtained in Reference Example 53的产率得到7-{1-[(2-bromo-1-benzothien-3-yl)carbonyl]piperidin-4-yl}-3,3-dimethyl-2-oxa-7-azaspiro[4.5]decan-1-one