Fast Numerical Evaluation of Time-Derivative Nonadiabatic Couplings for Mixed Quantum-Classical Methods Supplementary information This is the geometric configuration for CH2NH2+ used in Table I. Units: angstroms. C -2.91400807 -0.55823559 0.03052752 H -2.37721823 -1.66302155 0.09965968 H -3.96527633 -0.77226144 -0.33224522 N -2.34030191 0.59563094 0.25221390 H -1.39250034 0.47964458 0.56536622 H -2.80790566 1.54696657 0.05511270