Carrier compounds, compositions, and dosage unit forms therefor which are useful in the delivery of active agents are provided. The present invention provides a compound having the formula: ##STR1## or a salt thereof, wherein the compound may be used in a composition or dosage unit form for delivery of at least one active agent, including a peptide, mucopolysaccharide, carbohydrate, or a lipid. Methods of administration and preparation of the compounds and compositions of the invention are provided as well, including oral administration. Further, the compositions of the invention may be prepared by mixing at least one active agent, at least one carrier compound, and, optionally, a dosing vehicle.