2-[16-(2-amino-2-oxoethyl)-1,4,10,13-tetraoxa-7,16-diazacyclooctadec-7-yl]acetamide

1,4,10,13-tetraoxa-7,16-diazacyclooctadecane-2,6,17-trione

1,4,10-trioxa-13-thia-7,16-diazacyclooctadecane-8,12,15-trione

1,9,12,20-tetraoxa-4,6,15,17-tetrazacyclodocosane-5,16-dithione

1,9-dioxa-4,6-diazacycloundecane-5-thione