diff --git a/src/biomappings/resources/mappings.tsv b/src/biomappings/resources/mappings.tsv
index d592d193..4da27bdc 100644
--- a/src/biomappings/resources/mappings.tsv
+++ b/src/biomappings/resources/mappings.tsv
@@ -8051,7 +8051,7 @@ mesh	D019346	Sodium Acetate	skos:exactMatch	ncit	C47720	Sodium Acetate	semapv:Ma
 mesh	D019354	Sodium Lactate	skos:exactMatch	chebi	CHEBI:75228	sodium lactate	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370			
 mesh	D019354	Sodium Lactate	skos:exactMatch	ncit	C47726	Sodium Lactate	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370			
 mesh	D019379	Teriparatide	skos:exactMatch	chebi	CHEBI:135983	teriparatide	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370			
-mesh	D019386	Alendronate	obo:chebi#is_conjugate_base_of	chebi	CHEBI:2567	alendronic acid	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370			
+mesh	D019386	Alendronate	RO:0018033	chebi	CHEBI:2567	alendronic acid	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370
 mesh	D019438	Ritonavir	skos:exactMatch	chebi	CHEBI:45409	ritonavir	semapv:ManualMappingCuration	orcid:0000-0003-4423-4370			
 mesh	D019457	Chromosome Breakage	skos:exactMatch	go	GO:0031052	chromosome breakage	semapv:ManualMappingCuration	orcid:0000-0001-9439-5346			
 mesh	D019522	Vaginal Discharge	skos:exactMatch	efo	0009365	vaginal discharge	semapv:ManualMappingCuration	orcid:0000-0001-9439-5346