Crystal structure of 3,4,6,7,15,16,17,18,19,20,21,27-Dodecahydro-2,5,8-trioxa-16,20-diazatetracyclo[20.4.1.(16,20)0.0(9,14)]heptacosa-9,11,13,22,24,26(1)-hexaene
T. Hokelek et al., Crystal structure of 3,4,6,7,15,16,17,18,19,20,21,27-Dodecahydro-2,5,8-trioxa-16,20-diazatetracyclo[20.4.1.(16,20)0.0(9,14)]heptacosa-9,11,13,22,24,26(1)-hexaene, ANAL SCI, 17(3), 2001, pp. 465-466