| 主权项 |
1. A compound according to the following formula:wherein:
R1 is hydrogen, hydroxy, halo, lower alkyl, or lower alkoxy; R2 is hydrogen, hydroxy, halo, lower alkyl, or lower alkoxy; R3 is hydrogen, hydroxy, halo, lower alkyl, or lower alkoxy; R4 is hydrogen, hydroxy, halo, lower alkyl, or lower alkoxy; R5 is hydrogen, hydroxy, halo, lower alkyl, or lower alkoxy; R6 is hydrogen, hydroxy, halo, lower alkyl, or lower alkoxy; L is—CH2—CH═CH—CH2—, —CH2—CH(OH)—CH2—, —CH2—CH(OH)—CH2—O—CH2—CH(OH)—CH2—, —CH2—O—CH2—, —CH2—CH2—CH(CH3)—CH2—CH2—, —CH2—C(O)—CH2—, or —CH2—CH2—O—CH2—CH2—;
(a) is zero or one, wherein when (a) is zero, —X1-POLY1 is —COOH; (b) is one; X1, when present, is —C(O)O—, —OC(O)—, —NH—C(O)O—, —OC(O)—NH—, or a carbonyl; X2 is —C(O)O—, —OC(O)—, —NH—C(O)O—, —OC(O)—NH—, or a carbonyl; POLY1 is a poly(ethylene oxide) oligomer having a number of repeating monomers in the range of from 1 to 30; and POLY2 is a poly(ethylene oxide) oligomer having a number of repeating monomers in the range of from 1 to 30. |
