1,4-Dioxa-7,9-dithia-8-stannacycloundecane-5,11-dione, 8,8-dioctyl- 56875-68-4 67053-59-2 69226-44-4 93918-37-7 EINECS 260-414-4 Ethylenebisthioglycolate dioctyltin OTS 15