Chemistry, Organic Synthesis 90 Laboratory manuals 57 Biochemistry 39 Textbooks 36 Problems, exercises, etc 30 Spectrum analysis 28 more ... Chemistry 27 Biological chemistry 26 Chemical reactions 23 Congresses 18 Organic compounds 18 Chemistry, Analytic 17 Periodicals 17 Collected works 12 Nomenclature 11 Organometallic compounds 11 Study and teaching 11 Chemistry, Technical 10 Nuclear magnetic resonance spectroscopy 10 Programmed instruction 10 Qualitative 10 Photochemistry 9 Carbon compounds 8 Handbooks, manuals, etc 8 Mass spectrometry 8 Molecular orbitals 8 Natural products 8 Pharmaceutical chemistry 8 Chemistry, Pharmaceutical 7 less ...