omer ic ▁to ▁fil ip in ▁III . ▁ ▁Their ▁N MR ▁spect ra ▁are ▁nearly ▁identical ▁with ▁the ▁major ▁difference ▁being ▁the ▁splitting ▁pattern ▁of ▁the ▁pro ton ▁at ▁C 2 . ▁ ▁This ▁indicates ▁that ▁fil ip in ▁IV ▁is ▁probably ▁ep imer ic ▁to ▁fil ip in ▁III ▁at ▁either ▁C 1 ' ▁or ▁C 3 . ▁ ▁The ▁relative ▁and ▁absolute ▁s tere och em istry ▁of ▁fil ip in ▁III ▁was ▁determined ▁by ▁ 1 3 C ▁N MR ▁ac eton ide ▁analysis . ▁ ▁References ▁ ▁External ▁links ▁▁▁ ▁Category : Mac rol ides ▁Category : Ant if ung als ▁Category : Pol yen es <0x0A> </s> ▁Women ' s ▁events ▁at ▁the ▁Art istic ▁G ymn ast ics ▁World ▁Cup ▁were ▁first ▁held ▁at ▁the ▁ 1 9 7 5 ▁F IG ▁Art istic ▁G ymn ast ics ▁World ▁Cup . ▁ ▁Three ▁med als ▁are ▁awarded : ▁gold ▁for ▁first ▁place , ▁silver ▁for ▁second ▁place , ▁and ▁bronze ▁for ▁third ▁place . ▁T ie ▁break ers ▁have ▁not ▁been ▁used ▁in ▁every ▁year . ▁In ▁the ▁event ▁of ▁a ▁tie ▁between ▁two ▁g ymn asts , ▁both ▁names ▁are ▁listed , ▁and ▁the ▁following ▁position ▁( second ▁for ▁a ▁tie ▁for ▁first , ▁third ▁for ▁a ▁tie ▁for ▁second ) ▁is ▁left ▁empty ▁because ▁a ▁medal ▁was ▁not ▁awarded ▁for ▁that ▁position . ▁If ▁three ▁g ymn ast ics ▁tied ▁for ▁a ▁position , ▁the ▁following ▁two ▁positions ▁are ▁left ▁empty . ▁ ▁Medal