O`Brien leaves six in Oaks Aidan O`Brien was responsible for six of the 27 fillies left in the Vodafone Oaks at today`s forfeit stage.Irish 1000 Guineas hopes Quarter Moon and Kournakova headed the trainer`s team for a race he has won with Shahtoush and Imagine in the past four years.But Sir Michael Stoute`s Musidora Stakes winner Islington tops latest betting for the June 7th Epsom Classic.All the leading ante-post fancies stand their ground including Musidora second Spinnette and stable-companion Mellow Park who ran away with the Lupe Stakes for Jeremy Noseda at Goodwood yesterday.Sagitta 1000 Guineas winner Kazzia is Godolphin`s sole representative and could face a rematch with Newmarket runner-up Snowfire.Marcus Tregoning has left in Pretty Polly Stakes winner Esloob and Cheshire Oaks scorer Shadow Dancing, the latter bred and part-owned by legendary trainer Dick Hern who died yesterday.Seven-times Oaks-winning trainer Henry Cecil could run the once-raced Java but he has withdrawn recent Newbury second Protectress.Fillies can be supplemented for the mile-and-a-half Classic a week tomorrow at a cost of Stg£20,000.