Patent ID: 6982271

Claim:
A compound represented by formula (II): wherein, R 1 and R 2 each independently are selected from the group consisting of hydrogen, aryl, and heteroaryl, R 3 -R 13 are hydrogen; R 14 is selected from the group consisting of —R 16 C(O)OR 15 , —OC(O)R 15 , —O—R 17 , wherein R 17 is selected from the group consisting of alkyl, cycloalkyl, aryl, heteroaryl, alkenyl, and alkynyl; —R 16 (O)CR 15 ; —C(R 15 )═N(OH); carboxylic acid; —R 16 C(O)H; -Q 2 -P(Q 1 )(OR 15 ) 2 ; and silyl; R 15 represents independently for each occurrence hydrogen, alkyl, alkenyl, alkynyl, or aryl; R 16 represents independently for each occurrence a bond or an alkyl, alkenyl, alkynyl, or aryl biradical; Q 1 represents independently for each occurrence S or O; and Q 2 represents independently for each occurrence O, S, or NR 15 ; or a pharmaceutically acceptable salt thereof.