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For overcoming the ill-posedness of inverse vibrational problem, the quantum mechanical data are served as an additional information and as a stabilizer within the regularization procedure while looking for the Regularized Quantum Mechanical Force Field (RQMFF). Quantum mechanical data also provide a priori information on molecular force field model. As a result we obtain the regularized quantum mechanical force field (RSQMFF) in different set of generalized coordinates including the scaled Cartesian ones [2] which are convenient in applications to biological molecules. Examples of application of this approach to bulky systems are presented.