Donepezil intermediate 5,6-DIMETHOXY-2-(4-PIPERIDINYLMETHYL)-1-INDANONEHYDROCHLORIDE 2024년 3월 12일 L Biochem Donepezil intermediate 5,6-DIMETHOXY-2-(4-PIPERIDINYLMETHYL)-1-INDANONEHYDROCHLORIDE CAS # 120013-39-0 99%