constant:       energy_offset=-75.8415;
harmonic_angle: particle_type1=1,       particle_type2=8,       particle_type3=1,       spring_constant=0.742411,       equilibrium_distance=-0.300325;
harmonic_bond:  particle_type1=1,       particle_type2=8,       spring_constant=0.0372108,      equilibrium_distance=1.33548;