🌐EnglishEnglishDeutschFrançaisItalianoNederlandsPolskiPortuguêsالعربيةفارسی한국어EntityQ911288· pop 13· linked from 21 articlesquaternary carboncarbon atom bound to four other carbon atomsConnectionscarbonEntityInternational Standard Book NumberEntityCategoriesChemical nomenclatureOrganic chemistry