Based on a series of previous experiments, there is a natural relationship between the molecular structures of various chemicals and drugs and their biomedical and pharmacological characteristics. Topological Indices are numerical descriptors that are computed for various molecular structures. These topological indices deal with many properties of molecular structure. A dendrimer is a nanometer-scale star-shaped macromolecule. Three components define dendrimers: a central core, an interior dendritic structure (branches), and an exterior surface. Medical and pharmaceutical fields have used topological indices that predict the biological features of new chemical compounds and drugs by calculating weighted entropies for molecular structures. In this paper, we compute the First (a, b) K.A. Index, Sombor Index, Modified Sombor Index, Reduced Sombor Index, Reduced modified Sombor Index, Reduced 1 st (a, b) K.A. Index, Reduced 2nd (a, b) K.A. Index for Triazine Based Dendrimer (TBD− Gn). Furthermore, we determine weighted entropies of ???????????? − ???????? by computing the topological properties such as the 1st Zagreb index, 2nd Zagreb index, Modified 2nd Zagreb index, Augmented Zagreb Index, Hyper Zagreb 2nd Index, Redefined 1st Zagreb Index, Redefined 2nd Zagreb Index and Redefined 3rd Zagreb Index