1,3-Bis(cyclopropylmethyl)-8-(3-noradamantyl)xanthine 152534-48-0 1H-Purine-2,6-dione, 3,7-dihydro-1,3-bis(cyclopropylmethyl)-8-(hexahydro-2,5-methanopentalen-3a(1H)-yl)-