Comp. Source Ref.
3 Aplidium constellatum 81
  Bathymodiolus septemdierum 82
  Cynthia savignyi 83
  Didemnum salary 87
  Eunicella cavolini 88
  Glyptocidaris crenularis 89
  Helianthus tuberosus 27
  Hyrtios erectus 89
  Luffariella cf. variabilis 94
  Oscarella 91
  Trididemnum inarmatum 88
  Tripneustes gratilla 92
  Didemnum salary 87
4 Lactarius hatsudake 34
  Meretrix lusoria 93
  Luffariella cf. variabilis 94
  Didemnum salary 87
5 Luffariella cf. variabilis 94
  Meretrix lusoria 93
  Didemnum salary 87
 6 Luffariella cf. variabilis 94
  Didemnum salary 87
 7 Eunicella cavolini 88
  Luffariella cf. variabilis 94
  Trididemnum inarmatum 88
Table 2: Steroidal endoperoxides 3-7 and their natural sources.