TASK DEFINITION: In this task, you are given a sentence in the Spanish language. Your task is to translate the Spanish sentence into the English language.
PROBLEM: ¿En qué unidades se suele expresar el coeficiente de absortividad molar?

SOLUTION: In what units is usually expressed the coefficient of molar absorptivity?

PROBLEM: El enlace fosfodiéster

SOLUTION: The phosphodiester bond

PROBLEM: La aflatoxina B1 es un producto natural que debe su toxicidad a un producto de su metabolismo, muy reactivo, de naturaleza de 

SOLUTION:
Aflatoxin B1 is a natural product that owes its toxicity to a product of its metabolism, very reactive, of the nature of