Drug molecule redundancy

Hello!
I have been processing the molecule data providing drug structures and identifiers, and I noticed a few redundancy, many of which have just the stereochemistry that differs:

CHEMBL290962 ↔ CHEMBL2218861
CHEMBL2040681 ↔ CHEMBL4297065
CHEMBL1614709 ↔ CHEMBL1967878
CHEMBL118865<-> CHEMBL70586
CHEMBL87385 ↔ CHEMBL3989892
CHEMBL3183184 <->CHEMBL1200608
CHEMBL47<->CHEMBL3989727
CHEMBL313833<->CHEMBL3989843<->CHEMBL3989698<->CHEMBL542118
CHEMBL3989859<->CHEMBL1047
CHEMBL489<->CHEMBL10041
CHEMBL560<->CHEMBL100116<->CHEMBL3989510<->CHEMBL3989509
Would it be possible to either merge them or ensure they have parentId set please?

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