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background-repeat:no-repeat; font-size:14px; padding:6px 10px; height:29px; } .contFtB li{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconPntBk.png); background-repeat:no-repeat; list-style:none; padding:0 0 0 8px; } .treeH{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconTRHBG.png); background-repeat:repeat-x; padding:5px; } .treeH p{ background-repeat:no-repeat; color:#fff; font-size:12px; font-weight:bold; height:14px; margin:0; padding:0 0 0 18px; } .treeHPk{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconBxArPk.png); } .treeHGr{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconBxArGr.png); } .treeHBl{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconBxArBl.png); } .sideBcTL{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconSdBxBgBcL.png); background-repeat:no-repeat; width:5px; } .sideBcTC{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconSdBxBgBcC.png); 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top:-2px; } .bulb2{ background-image:url(https://cdn.weblio.jp/e7/img/icons/iconBLB.png); background-position:0 -24px; background-repeat:no-repeat; height:0; margin:0 0 0 0; padding:0 49px 1px 0; position:relative; top:-2px; } .bulb3{ background-image:url(https://cdn.weblio.jp/e7/img/icons/iconBLB.png); background-position:0 -36px; background-repeat:no-repeat; height:0; margin:0 0 0 0; padding:0 49px 1px 0; position:relative; top:-2px; } .bulb4{ background-image:url(https://cdn.weblio.jp/e7/img/icons/iconBLB.png); background-position:0 -48px; background-repeat:no-repeat; height:0; margin:0 0 0 0; padding:0 49px 1px 0; position:relative; top:-2px; } .bulb5{ background-image:url(https://cdn.weblio.jp/e7/img/icons/iconBLB.png); background-position:0 -60px; background-repeat:no-repeat; height:0; margin:0 0 0 0; padding:0 49px 1px 0; position:relative; top:-2px; } .bulb0, x:-moz-any-link{padding:0 49px 0 0;} .bulb1, x:-moz-any-link{padding:0 49px 0 0;} .bulb2, x:-moz-any-link{padding:0 49px 0 0;} .bulb3, x:-moz-any-link{padding:0 49px 0 0;} .bulb4, x:-moz-any-link{padding:0 49px 0 0;} .bulb5, x:-moz-any-link{padding:0 49px 0 0;} .sideRNBWords{padding:8px;} .sideRNBWords p{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconPntYl.png); background-position:left center; background-repeat:no-repeat; margin:0; padding:2px 0 2px 12px; } .sideBrH{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconSdBxBgBr.png); background-repeat:repeat-x; height:28px; } .sideBrH h3{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconSdBxRd.png); background-repeat:no-repeat; height:28px; } .sideBoxH{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconSdBxBgBr.png); background-repeat:repeat-x; height:28px; } .sideBoxH h2{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconSdBxRd.png); background-repeat:no-repeat; color:#fff; font-size:14px; font-weight:bold; height:28px; margin:0; padding:5px 0 0 12px; } .box-title-01 .title-main.title-trending::before { top: -webkit-calc(50% - 20px); top: calc(50% - 20px); width: 40px; height: 40px; background: url(https://cdn.weblio.jp/e7/img/www/ico_tranding@2x.png) center center no-repeat; background-size: 40px; } .sideOrH{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconSdBxBgOr.png); background-repeat:repeat-x; height:23px; } .sideOrH span{ color:#fff; display:block; font-weight:bold; padding:4px 0 0 7px; } .sideRkBNv1{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconRkW1.png); } .sideRkBNv2{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconRkW2.png); } .sideRkBNv3{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconRkW3.png); } .sideRkBNv4{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconRkW4.png); } .sideRkBNv5{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconRkW5.png); } .sideRkBNv6{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconRkW6.png); } .sideRkBNv7{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconRkW7.png); } .sideRkBNv8{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconRkW8.png); } .sideRkBNv9{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconRkW9.png); } .sideRkBNv10{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconRkW10.png); } .nrCntWsHB{ background-image:url(https://cdn.weblio.jp/e7/img/icons/iconYkP.png); background-position:-28px 0; background-repeat:no-repeat; display:block; float:left; font-size:0; height:13px; margin:4px 0 0 2px; text-decoration:none; width:13px; } .adHISSWrp .adHISp, .adHIWrp .adHISp, .adHIWrp .adFISp, .adMIWrp .adHSpl{ background-image:url(https://cdn.weblio.jp/e7/img/icons/wRenew/iconPntPk.png); background-position:left center; background-repeat:no-repeat; padding-left:10px; } .adLMIMAd .adHIcn{ background-image:url(https://cdn.weblio.jp/e7/img/ad/iconAdArw.png); background-repeat:no-repeat; background-position:3px 3px; margin:0; padding-left:15px; } .ertaTtl{ background-image:url(https://cdn.weblio.jp/e7/img/iconArrCrcRed.png); background-position:left center; background-repeat:no-repeat; font-weight:bold; margin-bottom:5px; padding-left:20px; }

分子式：	C₃H₂O₂
その他の名称：	Formylketene、1-Propene-1,3-dione、(Oxomethyl)ketene
体系名：	プロペン-1,3-ジオン、3-オキソプロペナール、1-プロペン-1,3-ジオン、ホルミルケテン、(オキソメチル)ケテン


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