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- Gschwend, Heinz [remove] 6
- 540 3
- 540.5 3
- Chemistry -- Abstracts -- Periodicals 3
- Chemistry -- Periodicals 3
- Chemistry, Analytical -- periodicals 3
- Chimie -- Périodiques 3
- Vitamin B12 -- Corrins -- Ring‐closure reactions 2
- organic chemistry, review -- pyrrole derivatives -- ring closure reactions, annulation reactions 2
- Corrins -- Enamides -- Imido esters -- Condensation reactions -- Vitamin B12 1
- organic chemistry, review -- pyrrole derivatives -- ring closure reactions, annulation reactions -- condensation reactions 1