--- a
+++ b/tests/data/pdb/3kwa_ligand.sdf
@@ -0,0 +1,34 @@
+ligand
+     RDKit          3D
+
+ 14 13  0  0  0  0  0  0  0  0999 V2000
+   -4.2887   -0.9243   11.4188 N   0  0  0  0  0  0  0  0  0  0  0  0
+   -5.1340   -1.3861   12.4918 C   0  0  0  0  0  0  0  0  0  0  0  0
+   -5.9322   -0.2038   12.9957 C   0  0  0  0  0  0  0  0  0  0  0  0
+   -5.6209    0.1068   14.4633 C   0  0  0  0  0  0  0  0  0  0  0  0
+   -4.2178    0.0726   14.8044 N   0  0  0  0  0  0  0  0  0  0  0  0
+   -3.6048   -1.2253   15.0272 C   0  0  0  0  0  0  0  0  0  0  0  0
+   -2.1122   -1.1901   15.2792 C   0  0  0  0  0  0  0  0  0  0  0  0
+   -1.9715   -0.3214   16.5163 C   0  0  0  0  0  0  0  0  0  0  0  0
+   -3.3621    0.0720   16.9333 C   0  0  0  0  0  0  0  0  0  0  0  0
+   -4.1390   -1.1024   17.2499 N   0  0  0  0  0  0  0  0  0  0  0  0
+   -5.4511   -1.0588   17.8220 C   0  0  0  0  0  0  0  0  0  0  0  0
+   -5.9965   -2.4646   17.9678 C   0  0  0  0  0  0  0  0  0  0  0  0
+   -4.9842   -3.4212   18.5937 C   0  0  0  0  0  0  0  0  0  0  0  0
+   -4.4345   -4.3236   17.6034 N   0  0  0  0  0  0  0  0  0  0  0  0
+  1  2  1  0
+  2  3  1  0
+  3  4  1  0
+  4  5  1  0
+  5  6  1  0
+  6  7  1  0
+  7  8  1  0
+  8  9  1  0
+  9 10  1  0
+ 10 11  1  0
+ 11 12  1  0
+ 12 13  1  0
+ 13 14  1  0
+M  CHG  4   1   1   5   1  10   1  14   1
+M  END
+$$$$