US 8,298,748 B2  64  63  -continued  -continued  (al-1-6)  (al-1-7)  (al-1-12)  (al-1-13)  (al-1-14)  (al-1-15)  (al-1-16)  (al-1-17)  (al-1-11)  (al-1-10)  [Chemical Formula 39]  (al-1-8)  (al-1-9)  Ra  I  -+CH~~to  Ra  I  -+CH~~ibn  Ra  I  ---tCH~~  CH3  0  g  Ra  I  ---tCH~~  C2Hs  0  g  Ra  I  ---tCH~~  Ra  I  ---tCH~~  0  Ra  I  ---tCH~~  0  Ra  I  ---tCH~~  0 