1'-OXo-2'-(tetrahydrofuran-2-ylmethyl)-1',4'-dihydro-2'h-spiro[cyclopentane-1,3'-isoquinoline]-4'-carboxylic acid 1g

1'-OXo-2'-(tetrahydrofuran-2-ylmethyl)-1',4'-dihydro-2'h-spiro[cyclopentane-1,3'-isoquinoline]-4'-carboxylic acid 1g