It looks like Russia announced its initial roster. I used a translator so I may not be accurate. In total 34 have been announced. 21 swimmers reached the individual standards, 9 will compete only in relays while 4 did not reach the standard, but were added due to being promising young athletes. In addition 4 athletes will get a second opportunity to reach the Russian standard at the European Championships while Yulia Efimova will be given a spot should she avoid suspension.
Individual Swimmers
Natalia Lovtsova (50m freestyle)
Veronika Popova (200m freestyle)
Victoria Andreeva (200 m freestyle, 200 m IM)
Daria Ustinova (100 and 200 m backstroke)
Anastasia Fesikova (100 and 200 m backstroke)
Sofya Andreeva (200m breaststroke)
Daria Chikunov (200m breaststroke)
Svetlana Chimrova (100m butterfly)
Vladimir Morozov (50 and 100m freestyle)
Andrew Grechin (100m freestyle)
Alexander Red (200 m and 400 m freestyle)
Yaroslav Potapov (1500 m freestyle)
Eugene Rilov (100 and 200 m backstroke)
Gregory Tarasevich (100 m backstroke)
Andrew Schabas (200 m m back)
Vsevolod Zanko (100m breaststroke)
Cyril Prigoda (100m breaststroke)
Anton Chupkov (200m breaststroke)
Ilya Khomenko (200m breaststroke)
Alexander Gardeners (100m butterfly)
Eugene Koptelov (100m butterfly)
Relays
4x100 m freestyle men - Vladimir Morozov, Andrei Grechin, Alexander Popkov, Alexander Sukhorukov.
4x200 m freestyle men - Alexander Red Nikita Lobintsev, Danila Izotov, Mikhail Dovgaluk, Vyacheslav Andrusenko.
4x100 m freestyle women - Veronika Popova, Victoria Andreeva Natalia Lovtsova, Rosalia Nasretdinova.
4x200 m freestyle women - Veronika Popova, Victoria Andreeva, Arina Openysheva Darya Mullakaeva.
4x100 m IM men - Eugene Rilov, Vsevolod Zanko, Alexander Gardeners, Vladimir Morozov
4x100 m IM women - Darya Ustinova Chikunov Daria, Svetlana Chimrova, Veronika Popova
Additional Athletes (Young Swimmers)
Daniel Pakhomov (200m butterfly)
Alex Bryansk (50m freestyle)
Semen Makovich (200 m IM)
Ilya Druzhinin (1500 m freestyle)
Athletes which will be given a second chance at European Championships
The medley - Semen Makovich (400 m IM), Andrey Zhilkin Alexander Osipenko
200 m butterfly - Nikolay Skvortsov
100 m breaststroke - Natalia Ivaneeva
Should Efimova have her suspension lifted then Natalia Ivaneeva will be removed should she qualify at the European Championship.