**1. Introduction**

Drug discovery is the process by which new candidate drugs are discovered. The chemical compounds that are present in plants and animals have been an important source of new bioactive compounds. Also, we can found organisms that live in air, water and soil that we don`t see, but posses a great variety of chemical that we can use to create new medicines. Bioactive compounds offer an enormous diversity of chemical structures with strong biolog‐ ic effect; this is one of the reasons why natural products research cannot be replaced by syn‐ thesis chemistry as a source for new bioactive compounds. Actually, more than the half of currently used medicines came from natural sources or are related to them, specifically in the situation of anticancer drugs that more than 60% belongs from nature [1].

*Based on the experience in this field, it is considered that a chemical compound isolated from natural origin should be fully assessed in order to be used to combat diseases; in this manner is important to consider the type of new chemical entities potentially applicable for partial or total synthesis, as well as its use in different kind of diseases that are treatable with these compounds (2); Therefore is very important continue the search for new secondarymetabolites potentially usable as drugs by human.*
