6,7,9,10-tetrahydro-16H,20H-dibenzo(h,q)1,4,7,13,10,16-tetraoxadiazacyclooctadecine-27,21(18H,22H)-dione
6,7,9,10-tetrahydro-16h,20h-dibenzo(h,q)1,4,7,13,10,16-tetraoxadiazacyclooctadecine-27,21(18h,22h)-dione