1-PMTR 1-phospho-5-S-methylthio-alpha-D-ribofuranoside 1-phospho-5-S-methylthioribose 1-phosphomethylthioribose 5-MTR-1-P 5-methylthio-5-deoxy-D-ribose-1-phosphate 5-methylthio-D-ribose-1-phosphate 5-methylthioribose-1-phosphate CPD-444 S5-methyl-5-thio-D-ribose-1-phosphate