Complex sentence: In the summer of 1865 Friedrich worked for the organic chemist Adolf Stecker in Göttingen, but his studies were interrupted for the year when he became ill with typhoid fever, which left him hearing-impaired; however, he still received his M.D. in 1868.
Split into simpler sentences: In the summer of 1865 Friedrich worked for the organic chemist Adolf Stecker in Göttingen. His studies were interrupted for the year when he became ill with typhoid fever; however, he still received his M.D. in 1868.