SISTEMAT X Web, an acronym of "SISTEMAT eXtended Webservices", is suite of tools to manage databank of secondary metabolites that is available to consult for entire scientific community, through a "Web" interface. SISTEMAT X Web manages databank of secondary metabolites, including information about the species and respective taxonomy data (genus, tribe, family). Additionally, it is possible to manage physical-chemical properties and experimental data, as NMR spectra or biological activity. The structures of secondary metabolites are available in MDL format (.mol) in 2 dimensions (2D) or (3D).