Download full text in PDF Opens in a new window. Article suggestions will be shown in a dialog on return to ScienceDirect. ... Please enable JavaScript to use all the features on this page. ... A formal total synthesis of (+/−)-perhydrohistrionicotoxin is reported. This sequence utilizes a regiospecific -acyliminium ion initiated-furan terminated cyclization to construct the desired azaspiro[5.5]undecane ring system. ... A formal total synthesis of (+/−)-perhydro HTX via ...