ambuphylline ambuphylline ambuphylline (or bufylline) is a combination of theophylline and aminoisobutanol used as a bronchodilator. it also acts and may be used as a diuretic. ambuphylline names iupac name 1,3-dimethyl-7h-purine-2,6-dione : 2-amino-2-methylpropan-1-ol other names theophylline aminoisobutanol, bufylline identifiers cas number 5634-34-4 y 3d model (jsmol) interactive image chembl chembl2104089 n chemspider 20536 y echa infocard 100.024.616 kegg d02884 y pubchem cid 21850 unii vou5v0b772 y comptox dashboard (epa) dtxsid60204880 inchi inchi=1s/c7h8n4o2.c4h11no/c1-10-5-4(8-3-9-5)6(12)11(2)7(10)13;1-4(2,5)3-6/h3h,1-2h3,(h,8,9);6h,3,5h2,1-2h3 ykey: seirrudmpnnscy-uhfffaoysa-n yinchi=1/c7h8n4o2.c4h11no/c1-10-5-4(8-3-9-5)6(12)11(2)7(10)13;1-4(2,5)3-6/h3h,1-2h3,(h,8,9);6h,3,5h2,1-2h3key: seirrudmpnnscy-uhfffaoyax smiles o=c2n(c1ncc1c(=o)n2c)c.occ(n)(c)c properties chemical formula c11h19n5o3 molar mass 269.30 g/mol appearance crystalline, slightly yellowish white powder melting point 254 to 256 °c (489 to 493 °f; 527 to 529 k) solubility in water freely soluble. pharmacology atc code r03da10 (who) except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). n verify (what is yn ?) infobox references