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. 2022 Nov 9;62(22):5622–5633. doi: 10.1021/acs.jcim.2c01153

Table 1. Number of Valence Parameters in a Selection of Modern Force Fields.

parameter type MMFF5 OPLS35 OPLS3e4 Sage (OpenFF 2.0.0)6
bond stretching 456 1187 1187 88
angle bending 2283 15,236 15,235 40
torsional rotation 520 48,142 146,669 167