MK-2048; (S)-2-(3-chloro-4-fluorobenzyl)-8-ethyl-10-hydroxy-N,6-dimethyl-1,9-dioxo-1,2,6,7,8,9-hexahydropyrazino[1',2':1,5]pyrrolo[2,3-d]pyridazine-4-carboxamide; CAS No.: 869901-69-9; (S)-2-(3-chloro-4-fluorobenzyl)-8-ethyl-10-hydroxy-N,6-dimethyl-1,9-dioxo-1,2,6,7,8,9-hexahydropyrazino[1',2':1,5]pyrrolo[2,3-d]pyridazine-4-carboxamide (CAS 869901-69-9) underscores ChemShuttle s role in pharma building blocks for fused heterocyclic systems. This pyridazine-pyrrolo hybrid (CAS 869901-69-9) serves as a pharma building block in kinase and protease inhibitor research. As a worldwide chemical supplier, ChemShuttle delivers CAS 869901-69-9 with validated enzymatic inhibition data.