21-CROWN-7
CAS No. 33089-36-0
21-CROWN-7;1,4,7,10,13,16,19-heptaoxacyclohenicosane;Ccris 3602;Einecs 251-373-3
BAS 78630 68143-02-2
navidrex-K 83487-88-1
CH2O3.xBa.xNa 681447-76-7