For many drugs, metabolism occurs in 2 phases. Phase I reactions involve formation of a new or modified functional group or cleavage (oxidation, reduction, hydrolysis); these reactions are nonsynthetic.
Use a capital letter for the first letter in the name when a noun is part of a name such as Calhoun High School. Use a capital letter in the case of a proper noun and in words that come from that proper noun. Examples: Texas and Texan. Use capital letters when naming religions, gods and any language.
There are some basic rules to follow to decide when to use a capital letter and when to leave the first letter lowercase. Actually, maybe I should state that many rules in English capitalization, do not apply in Spanish. In Spanish you do not capitalize the names of the days of the week, or the months of the year.