136819-65-3 3',4'-Dihydro-3'-bromo-4'-oxospiro(cyclpentane-1,2'-(1'H)naphthalene)-3'-carbonitrile 3-Bromo-4-oxo-3-cyano-1,2,3,4-tetrahydrospiro(naphthalene-3,1'-cyclopentane) BRN 5341442 Spiro(cyclpentane-1,2'(1'H)-naphthalene)-3'-carbonitrile, 3',4'-dihydro-3'-bromo-4'-oxo-