Patent ID: 8519110

Claim:
A composition comprising one or more of the following compounds, or a stereoisomer of one or more of the following compounds, or mixtures of stereoisomers of one or more of the following compounds, or a salt or salts of any of them: wherein Y 1 , Y 2 , Y 3 , and Y 4 are selected from the group consisting of O, BH 3 , and Se; the various Y i groups may be the same or different, wherein i is 1, 2, 3, or 4; and at least one Y i is BH 3 or Se; n is 0 or 1; R is selected from the group consisting of: R3 and R4 are selected from the group consisting of H, OH, OCH 3 and OCH 2 CH 3 ; and R3 and R4 may be the same or different; W is selected from the group consisting of R1 and R2 are selected from the group consisting of H, OH, OCH 3 , or OCH 2 CH 3 ; and R1 and R2 may be the same or different; and X is selected from the group consisting of methyl, ethyl, propyl, butyl, benzyl, substituted benzyl, methylenenaphthyl, and substituted methylenenaphthyl.