Error opening MOL files with RBC/SUB/UNC queries

[Zhirnoff]

Ketcher fails to open MOL V3000 files with RBC/SUB/UNC features

Steps to Reproduce

1. Open Ketcher
2. Create or open attached file with RBC/SUB/UNS queries
3. Look at error message

Expected behavior
Attached file added to canvas without error messages

Actual behavior
Remote Error message: Convert error! struct data not recognized as molecule, query, reaction or reaction query
Standalone Error message: Convert error! Given string could not be loaded as (query or plain) molecule or reaction, see the error messages: 'molfile loader: unsaturation flag is allowed only for queries', 'RXN loader: bad header ', 'RXN loader: bad header ', 'molfile loader: invalid RBCNT value: -2'

Attachments

Desktop (please complete the following information):

• OS: Windows 10
• Browser Chrome
• Version 108.0.5359.99 (Official Build) (64-bit)

Ketcher version
[Version 2.7.0]
Indigo related issue: epam/Indigo#928