label: O-(5'-dimethoxytrityl-2'-deoxythmidin-3'-yl)-O'-(3'-acetyl-2'-deoxythymidin-5'-yl)hydrogenphosphonate
label_lc: o-(5'-dimethoxytrityl-2'-deoxythmidin-3'-yl)-o'-(3'-acetyl-2'-deoxythymidin-5'-yl)hydrogenphosphonate