Bioactive Sphingosine from Ficus racemosa: Isolation, Structural Elucidation, DFT Studies and Cytotoxic Potential against Oral Carcinoma Cells Via in Vitro and in Silico Approaches. - Dhakshinamoorthy R; Kesavan S; Sundararaj AS; Shanmugam J; Ramachandran S; Mohan S; Vijayakumar S (Applied biochemistry and biotechnology, 2026)