Used as a prodrug in antiemetic therapy, particularly to prevent nausea and vomiting associated with chemotherapy. It is administered intravenously and rapidly converts to aprepitant in the bloodstream, enhancing patient compliance when oral intake is not feasible. Its primary application is in combination with other antiemetics like corticosteroids and serotonin receptor antagonists for highly emetogenic chemotherapy regimens. The benzyl ester modification improves water solubility, allowing for efficient intravenous delivery.