Maravirov Amine impurity

Maravirov Amine impurity is a structurally related synthetic byproduct arising from the amidation step in Maravirov synthesis. It features a primary amine group substituted at the terminal position of the cyclopropylmethyl side chain, differing from the parent drug's secondary amine moiety. The compound retains the core bicyclic scaffold with a fused pyrazole-indole system, but exhibits altered electronic properties due to the amine substitution. This impurity serves as a critical HPLC reference standard for quantifying process-related amine variants in API batches.