1-{(2R,3S)-3-[(tert-Butoxycarbonyl)amino]-2-hydroxy-4-phenylbutanoyl}-L-prolyl-N1-(cyclohexylmethyl)-L-valinamide- AIDS-163633 AIDS163633 Boc-(2R, 3S)- AHPBA-Pro-Ile-NH-CH2-C6H11