bortezomib ER stress dependent chemical compound bortezomib [ER stress] C19H25BN4O4 CC(C)C[C@H](NC(=O)[C@H](Cc1ccccc1)NC(=O)c1cnccn1)B(O)O PMID: 23877657 PMID: 28588081 PMID:29980790 Wikipedia:Bortezomib