A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, COA of Formula: https://www.ambeed.com/products/4271-30-1.html, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 4271-30-1, Name is (S)-2-(4-Aminobenzamido)pentanedioic acid, molecular formula is C12H14N2O5. In an article, author is Zare, Abdolkarim,once mentioned of 4271-30-1.
A novel BrOnsted acidic ionic liquid namely N,N-diethyl-N-sulfoethanamminium hydrogen sulfate ([Et3N-SO3H]HSO4) was synthesized, and characterized using FT-IR, H-1 NMR, C-13 NMR, and mass data. Then, its catalytic activity was examined for the preparation of triazolo[1,2-a]-indazole-triones and 2H-indazolo[2,1-b]phthalazine-triones by the one-pot multi-component condensation of arylaldehydes with dimedone and 4-phenylurazole/2,3-dihydrophthalazine-1,4-dione under solvent-free conditions. [Et3N-SO3H]HSO4 efficiently promoted the reaction to afford the products in high yields and in short reaction times.
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Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem