Used in the synthesis of antibody-drug conjugates (ADCs), this compound acts as a linker with a reactive aldehyde group that enables site-specific attachment to antibodies. Its design allows controlled drug release through ester hydrolysis and structural stability in circulation. The carboxylic acid group facilitates conjugation to cytotoxic payloads, making it valuable in targeted cancer therapies. It supports improved pharmacokinetics and reduced off-target toxicity in ADC development.