Pellagrazeine is not a commonly used word and its spelling may seem confusing. However, by using the International Phonetic Alphabet (IPA) transcription, we can break it down into syllables and sounds. The word is pronounced as /pɛləɡreɪzin/ with the stress on the second syllable. The "pellagra" part is derived from an Italian term that refers to a disease caused by a deficiency of niacin, and the "-zeine" suffix is likely created to make it sound like a chemical compound. Overall, pellagrazeine is not a natural word and is likely invented for fictional or scientific purposes.
A hypothetical ptomaine from diseased maize, suggested as the exciting cause of pellagra.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.