Conversion to SMILES does not return results

[Former user]

Starting from HMDB (or ChEBI) does not return SMILES Example identifiers I used:

Human Metabolome Database ChEBI SMILES InChI Code HMDB0000112 CHEBI:16865 InChI=1S/C4H9NO2/c5-3-1-2-4(6)7/h1-3,5H2,(H,6,7) HMDB0013037 No result InChI=1S/C26H44N7O17P3S/c1-4-5-6-17(35)54-10-9-28-16(34)7-8-29-24(38)21(37)26(2,3)12-47-53(44,45)50-52(42,43)46-11-15-20(49-51(39,40)41)19(36)25(48-15)33-14-32-18-22(27)30-13-31-23(18)33/h13-15,19-21,25,36-37H,4-12H2,1-3H3,(H,28,34)(H,29,38)(H,42,43)(H,44,45)(H2,27,30,31)(H2,39,40,41)/t15-,19-,20-,21?,25-/m1/s1 HMDB0060685 CHEBI:80638 InChI=1S/C8H14O3/c1-3-5-6(8(10)11)7(9)4-2/h6H,3-5H2,1-2H3,(H,10,11) HMDB0060684 CHEBI:80644 InChI=1S/C8H14O4/c1-2-3-6(8(11)12)4-5-7(9)10/h6H,2-5H2,1H3,(H,9,10)(H,11,12) HMDB0013899 CHEBI:80637 InChI=1S/C8H16O3/c1-3-5-6(8(10)11)7(9)4-2/h6-7,9H,3-5H2,1-2H3,(H,10,11) HMDB0060682 CHEBI:80642 InChI=1S/C8H12O2/c1-3-5-7(6-4-2)8(9)10/h3,5H,1,4,6H2,2H3,(H,9,10)/b7-5+