1,4,10,13-Pentaoxacyclopentadecane 1,4,7,10,13-PENTAOXACYCLOPENTADECANE 15-Crown-5 168081-57-0 33100-27-5 5-19-12-00252 (Beilstein Handbook Reference) BRN 1618144 CCRIS 3586 EINECS 251-379-6