The research introduces a new graph diffusion model called DMol for small molecule generation.DMol outperforms the state-of-the-art DiGress model in terms of validity by approximately 1.5% across benchmarking datasets.The number of diffusion steps in DMol is reduced by at least 10-fold compared to DiGress, resulting in improved running time.DMol can be combined with junction-tree-like graph representations for simpler sample generation with additional validity improvements.