sentence2_structure: The amount of product<>may be produced<>by a reaction under specified conditions$$$The amount of product that may be produced by a reaction under specified conditions<>is called<>theoretical yield
sentence1: Click chemistry uses high-yielding and practical reactions (click reactions) that need no, or minimal, purification (i.e., approximately no by-products are produced).
sentence2: The amount of product that may be produced by a reaction under specified conditions is called theoretical yield.
question: What is the amount of product that may be produced by a reaction under specified conditions called?