Mass Spectrometry / Drug delivery / Drug Delivery System / Sterilization / Enzyme / Butyric Acid / Fatty Acid / Therapeutic Use / Human Serum Albumin (HSA) / Peptide Therapeutics / Biochemistry and cell biology / Butyric Acid / Fatty Acid / Therapeutic Use / Human Serum Albumin (HSA) / Peptide Therapeutics / Biochemistry and cell biology