Synonyms: 141684-50-6;141781-18-2;XyloU TSAO deriv.;RiboU TSAO deriv.;AC1L9RO0;1-(.beta.-D-Ribofuranosyl]uracil]-3'-spiro-5-[4-amino-1,2-oxathiole 2,2-dioxide;1-(.beta.-D-Xylofuranosyl]uracil]-3'-spiro-5-[4-amino-1,2-oxathiole 2,2-dioxide;1-(beta-D-Ribofuranosyl)uracil)-3'-spiro-5-(4-amino-1,2-oxathiole 2,2-dioxide;1-(beta-D-Xylofuranosyl)uracil)-3'-spiro-5-(4-amino-1,2-oxathiole 2,2-dioxide