vdw parameters for NMA MASS HN 1.0 HC 1.0 H1 1.0 O 16. CT 12. C 12. N 14. ANGL N -CT-H1 50.0 109.5 C -CT-HC 50.0 109.5 NONB HN 0.6000 0.0150 HC 1.4870 0.0150 H1 1.3870 0.0150 O 1.7683 0.1520 CT 1.9080 0.1094 C 1.9080 0.0860 N 1.8240 0.1700