Author(s): Keerthi Patil and Doris M Singh

Abstract: Cylindrospermum is a filamentous cyanobacterium capable of both photosynthesis and nitrogen fixation. Chemical constituents of the Cylindrospermum sp. PCC518, Cylindrospermum sp. PCC 567 have not been entirely detected. In our present study, Cylindrospermum sp. PCC518, Cylindrospermum sp. PCC 567 cultures were mass cultured and crude extracts were extracted with soxhlet apparatus by using Ethanol and Hexane as the solvents, the chemical constituents and phyto-components were successively determined by GC–MS. A total of 54 compounds were identified from ethanol and hexane extracts which are having Antifungal, antibacterial, antioxidant, anti-inflammatory, anticancer, antiviral activities.