Morpholine, 4,4'-(hexahydro-2,6,3,5-ethanediylidene- 2H-pentaleno[1,6-bc]furan-2,6a(2aH)-diyl)di- Morpholine, 4,4'-(hexahydro-2,6,3,5-ethanediylidene-2H-pentaleno[1,6-bc]furan-2,6a(2aH)-diyl)bis- NSC677229