12H-7,11-Nitrilo-6H-dibenzo(b,k)(1,4,7,10,13)pentaoxacycloeicosin, 9,20,22,23-tetrahydro-, compd. with (chloromethyl)oxirane (2:1) 74261-20-4 Oxirane, (chloromethyl)-, compd with 19,20,22,23-tetrahydro-12H-7,11-nitrilo-6H-dibenzo(b,k)(1,4,7,10,13)pentaoxacycloeicosin (1:2)