Two new steroid sulfates 1 and 2 were obtained from a lipophilic extract of an undescribed bryozoan species in the genus Calyptotheca. The structures of compounds 1 and 2 were elucidated by spectroscopic methods and chemical modifications. Steroids 1 and 2 exhibited moderate cytotoxicity at IC50 54 and 30 µM, respectively, against NBT-T2 cells.

Depth range
40- 70 m

Mesophotic “mentions”
3 x (total of 1884 words)

Classification
* Presents original data
* Focused on 'mesophotic' depth range
* Focused on 'mesophotic coral ecosystem'

Fields
Biomedicine
Molecular ecology

Focusgroups
Other invertebrates

Locations
Japan - Ryukyu Islands (Okinawa)

Platforms
Rebreather