Try searching for...
SCFBio, IIT Delhi
Formula: C8H14S4Se | Mol. Weight: 317.40 g/mol
IUPAC: 3-(prop-2-enylsulfanylmethylsulfanylselanylsulfanylmethylsulfanyl)prop-1-ene
C=CCSCS[Se]SCSCC=C