草酸 、
2,2-Dimethyl-propionic acid 1-cyclohexylaminomethyl-2-(6,7,8,9-tetrahydro-dibenzofuran-2-yloxy)-ethyl ester 以
乙醚 、
乙醇 为溶剂,
以90%的产率得到2,2-Dimethyl-propionic acid 1-cyclohexylaminomethyl-2-(6,7,8,9-tetrahydro-dibenzofuran-2-yloxy)-ethyl ester; compound with oxalic acid