remark goes here
MASS
CT 12.010        0.878               same as c3 
HC 1.008         0.135               same as hc 

BOND
CT-HC  337.30   1.092       same as c3-hc
CT-CT  303.10   1.535       same as c3-c3

ANGLE
CT-CT-HC   46.400     110.050   same as c3-c3-hc
CT-CT-CT   63.200     110.630   same as c3-c3-c3
HC-CT-HC   39.400     108.350   same as hc-c3-hc

DIHE
CT-CT-CT-HC   1    0.156         0.000           3.000      same as X -c3-c3-X 
CT-CT-CT-CT   1    0.156         0.000           3.000      same as X -c3-c3-X 
HC-CT-CT-HC   1    0.156         0.000           3.000      same as X -c3-c3-X 

IMPROPER

NONBON
  CT          1.9080  0.1094             same as c3 
  HC          1.4870  0.0157             same as hc