Complex sentence: The majority of oligosaccharides found in IMO consist of 3 to 6 monosaccharide (glucose) units linked together; however, disaccharides, as well as longer polysaccharides (up to 9 glucose units) are also present.
Split into simpler sentences: The majority of oligosaccharides found in IMO consist of 3 to 6 monosaccharide (glucose) units linked together. However, disaccharides, as well as longer polysaccharides (up to 9 glucose units), are also present.