Submitted by György Chityil ... on Fri, 01/19/2018 - 16:45 Hierarchy: NounDescription: {{organic compound}} MPP+, the active metabolite of MPTP.Ngram: 1-methyl-4-phenylpyridiniumNgram Text: 1-methyl-4-phenylpyridiniumSource: WiktionaryIssue: 0Wiktionary tag: organic compoundNgram Count: 1