Adapted form Kollman and amino10.in for PPO

MASS
nc    14.010        0.530             same as NC   
na    14.010        0.530             same as NA
cd    12.010        0.360             same as CD
ss    32.060        2.900             same as S
c3    12.010        0.360             same as C*
cc    12.010        0.360             same as CC
h4    1.0080        0.167             same as H4  
hn    1.0080        0.161             same as HZ
CU    63.550
Omu2  16.000         

BOND
NB-CU    2.100       300.000
na-CU    2.100       300.000
CU-Omu2  1.900       300.000
Omu2-Omu2  1.450       553.000
C-n2       1.335       490.000
c-N        1.335       490.000

ANGLE
CV-NB-CU       125.000       10.000
NB-CU-na       109.500        0.010
NB-CU-NB       109.500        0.010
NB-CU-Omu2     109.500        0.010
CR-NB-CU       127.000       10.000
O-C-n2            80.000      122.900
CX-C-n2           70.000      116.600
c-N-H             50.000      118.040
c-N-CX            70.000      116.600
O-C-n2            80.000      122.900
na-CU-NB       109.500        0.010
na-CU-Omu2     109.500        0.010
cc-na-CU       127.000       10.000
c2-na-CU       125.000       10.000
CU-Omu2-Omu2       70.000       10.000
CU-Omu2-CU      138.000       10.000
Omu2-CU-Omu2      109.500        0.010

DIHE
na-CU-Omu2-Omu2       0.000         0.000           0.000
na-CU-Omu2-CU       0.000         0.000           0.000       
CV-NB-CU-Omu2         0.000         0.000           0.000
NB-CU-Omu2-CU       0.000         0.000           0.000
NB-CU-Omu2-Omu2       0.000         0.000           0.000
CR-NB-CU-Omu2         0.000         0.000           0.000
CR-CV-NB-CU         0.000         0.000           0.000    
CU-Omu2-Omu2-CU     0.000         0.000           0.000
CU-Omu2-CU-Omu2     0.000         0.000           0.000  
Omu2-CU-Omu2-CU     0.000         0.000           0.000     
nc-cd-ss-c3         2    2.200       180.000           2.000      same as X -c2-ss-X , penalty score=232.0
na-cd-ss-c3         2    2.200       180.000           2.000      same as X -c2-ss-X , penalty score=232.0

IMPROPER
c3-cd-cc-nc         1.1          180.0         2.0          Using the default value
cc-h4-cd-na         1.1          180.0         2.0          Same as X -X -ca-ha, penalty score= 67.2 (use general term))
na-nc-cd-ss         1.1          180.0         2.0          Using the default value
cd-cd-na-hn         1.1          180.0         2.0          Using the default value

NONBONDED
Omu2 1.661 0.2100
CU 1.600 0.1000