Computational Methodology: QM-symex inherits the rigorous data generation process established in QM-sym, ensuring the stability and symmetry of its molecules. Building upon the 135,000 structures from QM-sym, an additional 38,000 molecules were meticulously generated. Maintaining symmetry preservation and stability remains a core principle. Using Gaussian 09 optimization with 100 cycles, each molecule undergoes rigorous validation to retain its original symmetry throughout the process.