there is no widely known or established information about a substance or product called "Retroxil." It is possible that Retroxil might be a newly developed product or a term that emerged , or it could be a niche product with limited exposure.
If Retroxil is something new or specific to a certain industry or field, I wouldn't have any information about it as my data only goes . To learn more about Retroxil, I suggest conducting a web search using the most recent information available or specifying the context in which you came across the term.