Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) D. John Faulkner,"Variabilin, an antibiotic from the sponge, ircinia variabilis",Tetrahedron Letters,0040-4039,Elsevier BV,1973,14,39,3821-3822,https://cir.nii.ac.jp/crid/1363670320802267520,https://doi.org/10.1016/s0040-4039(01)87045-3