Suddenly, a small "CH3" branch sprouted from the side. "That’s a methyl group," the atom explained. "You must number the chain so the branch gets the lowest number possible."
by Cecilio Márquez Salamanca (University of Alicante) is a gold standard, offering extensive solved problems for various organic compounds including alkanes. Focused Technical Guides NOMENCLATURA DE COMPUESTOS ORGÁNICOS nomenclatura de alcanos ejercicios resueltos pdf
Si buscas dominar este tema, aquí tienes una guía detallada con los fundamentos y que suelen aparecer en exámenes y guías de estudio. Reglas IUPAC para nombrar Alcanos Paso a Paso Suddenly, a small "CH3" branch sprouted from the side