[(E)-[2,3,5,6-tetrahydroxy-4-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyhexylidene]amino]urea

[1-(furan-3-yl)ethylideneamino]urea

(1-pyridin-2-ylpropan-2-ylideneamino)urea

1-(carbamoylamino)-3-phenylurea

[(氨基羰基)亚肼基]乙酸