918440-94-5 1,4,7,10,13,16-Hexaoxacyclooctadecane-2,5,8,11,14,17-hexone,3,6,9,12,15,18-hexamethyl-, (3R,6R,9R,12S,15S,18S)-rel- 113145-79-2 1,3,10,12-Tetraoxa-6,7,15,16-tetrathia-2,11-distibacyclooctadecane-4,9,13,18-tetrone, 2,2,11,11-tetrahydro-2,2,2,11,11,11-hexaphenyl-