.at_1{HEIGHT:18.75pt}.at_0{WIDTH:229pt;BORDER-COLLAPSE:collapse}.at_4{BORDER-RIGHT:windowtext0.5ptsolid;BORDER-TOP:windowtext0.5ptsolid;BORDER-LEFT:windowtext;WIDTH:54pt;BORDER-BOTTOM:windowtext0.5ptsolid;BACKGROUND-COLOR:#ccffff}.at_2{BORDER-RIGHT:windowtext0.5ptsolid;BORDER-TOP:windowtext0.5ptsolid;BORDER-LEFT:windowtext0.5ptsolid;WIDTH:113pt;BORDER-BOTTOM:windowtext0.5ptsolid;HEIGHT:18.75pt;BACKGROUND-COLOR:#ccffff}.at_3{BORDER-RIGHT:windowtext0.5ptsolid;BORDER-TOP:windowtext0.5ptsolid;BORDER-LEFT:windowtext;WIDTH:62pt;BORDER-BOTTOM:windowtext0.5ptsolid;BACKGROUND-COLOR:#ccffff}2-四氫糠胺