15,18,35,38,43,46,53,56-octaoxa-1,12,21,32-tetraazaheptacyclo[30.8.8.812,21.13,7.16,10.123,27.126,30]hexaconta-3,5,7(60),8,10(59),23,25,27(50),28,30(49)-decaene (en)