Task: Translation
Input (Spanish): ; the ring A represents a carbon ring or a heterocycle; R1 represents alkyl, alkenyl, alkynyl, NR4R5, OR6, etc.
Output (English): ; el anillo A es un anillo carbociclico, un anillo heterociclico; R1 es alquilo, alquenilo, alquinilo, NR4R5, OR6, etc.