5-甲基-1,2,4-噻唑-3,4-二胺

[(Z)-1-(furan-2-yl)ethylideneamino]urea

(prop-2-ynylideneamino)urea

5,6-二氢环戊烯并[c]吡唑-2(4H)-甲酰胺

(ethylcarbamothioylamino)urea