The precomposed character you chose is not available (yet), neither in Unicode 2.0 nor in its TITUS extension.

List of Latin-based precomposed UNICODE characters with description of their elements.

TITUS extensions are in green.
LATIN SMALL LETTER R WITH GRAVE(r̀)
E68D590210072+0300114+768
LATIN SMALL LETTER R WITH GRAVE AND DOT BELOW(ṛ̀)
E68E590220072+0300+0323114+768+803
LATIN SMALL LETTER R WITH GRAVE AND RING BELOW(r̥̀)
E68F590230072+0300+0325114+768+805
ŕLATIN SMALL LETTER R WITH ACUTE(ŕ)
01553410072+0301114+769
LATIN SMALL LETTER R WITH ACUTE AND DOT BELOW(ṛ́)
E690590240072+0301+0323114+769+803
LATIN SMALL LETTER R WITH ACUTE AND RING BELOW(ŕ̥)
E691590250072+0301+0325114+769+805
LATIN SMALL LETTER R WITH CIRCUMFLEX(r̂)
E692590260072+0302114+770
LATIN SMALL LETTER R WITH CIRCUMFLEX AND RING BELOW(r̥̂)
E693590270072+0302+0325114+770+805
LATIN SMALL LETTER R WITH TILDE(r̃)
E694590280072+0303114+771
LATIN SMALL LETTER R WITH TILDE AND RING BELOW(r̥̃)
E695590290072+0303+0325114+771+805
LATIN SMALL LETTER R WITH MACRON(r̄)
E696590300072+0304114+772
LATIN SMALL LETTER R WITH MACRON AND ACUTE AND DOT BELOW(ṝ́)
E697590310072+0304+0301+0323114+772+769+803
LATIN SMALL LETTER R WITH MACRON AND ACUTE AND RING BELOW(r̥̄́)
E698590320072+0304+0301+0325114+772+769+805
LATIN SMALL LETTER R WITH MACRON AND TILDE AND DOT BELOW(ṝ̃)
E699590330072+0304+0303+0323114+772+771+803
LATIN SMALL LETTER R WITH MACRON AND BREVE AND DOT BELOW(ṝ̆)
E69A590340072+0304+0306+0323114+772+774+803
LATIN SMALL LETTER R WITH MACRON AND BREVE AND RING BELOW(r̥̄̆)
E69B590350072+0304+0306+0325114+772+774+805
LATIN SMALL LETTER R WITH MACRON AND RING BELOW(r̥̄)
E69C590360072+0304+0325114+772+805
LATIN SMALL LETTER R WITH MACRON AND OGONEK(r̨̄)
E69D590370072+0304+0328114+772+808
LATIN SMALL LETTER R WITH BREVE(r̆)
E69E590380072+0306114+774
ṙLATIN SMALL LETTER R WITH DOT ABOVE(ṙ)
1E5977690072+0307114+775
řLATIN SMALL LETTER R WITH CARON(ř)
01593450072+030C114+780
LATIN SMALL LETTER R WITH CARON AND RING BELOW(ř̥)
E69F590390072+030C+0325114+780+805
ȑLATIN SMALL LETTER R WITH DOUBLE GRAVE(ȑ)
02115290072+030F114+783
ȓLATIN SMALL LETTER R WITH INVERTED BREVE(ȓ)
02135310072+0311114+785
LATIN SMALL LETTER R WITH COMMA ABOVE RIGHT(r̕)
E6A0590400072+0315114+789
LATIN SMALL LETTER R WITH PALATALIZED HOOK(r̡)
E6A1590410072+0321114+801
ṛLATIN SMALL LETTER R WITH DOT BELOW(ṛ)
1E5B77710072+0323114+803
ṝLATIN SMALL LETTER R WITH DOT BELOW AND MACRON(ṝ)
1E5D77730072+0323+0304114+803+772
LATIN SMALL LETTER R WITH DIAERESIS BELOW(r̤)
E6A2590420072+0324114+804
LATIN SMALL LETTER R WITH RING BELOW(r̥)
E6A3590430072+0325114+805
LATIN SMALL LETTER R WITH COMMA BELOW(r̦)
E6A4590440072+0326114+806
ŗLATIN SMALL LETTER R WITH CEDILLA(ŗ)
01573430072+0327114+807
LATIN SMALL LETTER R WITH OGONEK(r̨)
E6A5590450072+0328114+808
LATIN SMALL LETTER R WITH VERTICAL LINE BELOW(r̩)
E6A6590460072+0329114+809
LATIN SMALL LETTER R WITH CARON BELOW(r̬)
E6A7590470072+032C114+812
LATIN SMALL LETTER R WITH CIRCUMFLEX BELOW(r̭)
E6A8590480072+032D114+813
LATIN SMALL LETTER R WITH INVERTED BREVE BELOW(r̯)
E6A9590490072+032F114+815
ṟLATIN SMALL LETTER R WITH MACRON BELOW(ṟ)
1E5F77750072+0331114+817
LATIN SMALL LETTER R WITH SHORT SOLIDUS OVERLAY(r̷)
E6AA590500072+0337114+823
LATIN SMALL LETTER R WITH SUPERSCRIPT ONE(r1)
E6AB590510072++0031114+49
LATIN SMALL LETTER R WITH SUPERSCRIPT TWO(r2)
E6AC590520072++0032114+50
LATIN SMALL LETTER R WITH TOCHARIAN BOW DOWN AND MODIFIER LETTER SMALL U SUBSCRIPT(ru)
E6AD590530072+F0C1++0075114+61633+117
LATIN SMALL LETTER R WITH ACUTE ABOVE RIGHT(r)
E6AE590540072+F0D0114+61648


 The precomposed character you chose is not available (yet), neither in Unicode 2.0 nor in its TITUS extension.