0  B7R1.4  CN1CCCC1=O DB12521 [1,0,0,0,0,0|1,0,1]=3
1  B6R0.4  NCCCC(=O)O DB02530 [1,0,1,0,0,0|1,0,1]=4
2  B6R0.4  O=C([O-])CCCO DB01440 [1,0,1,0,0,0|1,0,1]=4
3  B8R0.2  CC[C@H](C)[C@H](N)C(=O)O DB00167 [0,1,1,0,0,0|1,0,1]=4