149598-70-9 ATCC 20928 factor A Mer NF5003F Mer-NF5003F Spiro(benzofuran-2(3H),1'(2'H)-naphthalene)-6,7-dicarboxaldehyde, 3',4',4'a,5',6',7',8',8'a-octahydro-4,6'-dihydroxy-2',5',5',8'a-tetramethyl-, (1'R-(1'alpha,2'alpha,4'aalpha,6'aalpha,8'aalpha))-