Patent ID: 8598313

Claim:
A composition comprising an isolated compound consisting essentially of: compound having the formula wherein R 1 =H, CH 3 R 2 =H, CH 3 , i-Pr, t-Bu R 3 =H, CH 3 , i-Pr, CH(CH 3 )CH 2 CH 3 , CH 2 CH(CH 3 ) 2 R 4 =H, CH 3 , i-Pr, CH(CH 3 )CH 2 CH 3 , CH 2 CH(CH 3 ) 2 R 5 =H, CH 3 , i-Pr, CH(CH 3 )CH 2 CH 3 , CH 2 CH(CH 3 ) 2 R 6 =CH 2 PhOH, CH 2 PhOMe, CH 2 Ph X=O, S, N.