1-[4-甲氧基-6-(2-哌啶-1-基乙氧基)-1-苯并呋喃-5-基]-3-甲基脲

1-methyl-3-[2-(methylcarbamoylamino)ethyl]urea

1-(2-aminoethyl)-3-methylurea

1-[[3,4-dihydroxy-5-(6-oxo-3H-purin-9-yl)oxolan-2-yl]methyl]-3-methylurea

1,1-diethyl-3-methyl-3-trimethylsilylurea