Maleamic methyl ester-based linker 12a
     RDKit          2D

 33 33  0  0  1  0  0  0  0  0999 V2000
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    4.9258    0.7121    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
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    9.2945    3.5253    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.2362   -0.4763    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    8.4824    4.7865    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -7.3121    5.3202    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -6.6259    6.6541    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   10.7928    3.5981    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  2  0
  1  6  1  0
  2  3  1  0
  3  4  2  0
  3 31  1  0
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 28 33  1  0
 31 32  1  0
M  END
>  <s_m_entry_id>  (1) 
121

>  <s_m_entry_name>  (1) 
entry

>  <r_f3d_energy>  (1) 
0

>  <i_f3d_flags>  (1) 
0

$$$$
