Preview: CHEM are ignored without any messages or incorrect message while we save sequence with CHEM to IDT

[NadezhdaPeskun]

Steps to Reproduce Scenario 1

1. Switch to Macro
2. Open KET file with CHEM ketcher (middle Chem).zip
3. try to save to IDT

Scenario 2

1. Open KET file with only CHEM ketcher (only Chems).zip

2. try to save to IDT >> empty IDT file is created ketcher (Empty from only Chems).zip

Scenario 3

1. Open KET file with only CHEM ketcher (Chem first).zip

2. try to save to IDT >> empty IDT file is created

Actual behavior CHEM are ignored without any messages or incorrect error message while Chem linked to Sugar.

Expected behavior According to BA solution:

We should have message for CHEM as for Peptides if Chem is not in IDT library "Cannot save molecule in IDT format - monomer(s)… doesn’t have IDT code."

as per - https://github.com/epam/ketcher/issues/4495

Related:

• https://github.com/epam/ketcher/issues/4495
• https://github.com/epam/ketcher/issues/4639
• https://github.com/epam/Indigo/issues/1957
• https://github.com/epam/ketcher/issues/4634

Win11 Chrome: Version 123.0.6312.123 (Official Build) (64-bit)

Ketcher [Version 2.22-rc.1] CI [Indigo Toolkit] CI Version 1.21.0-rc.1