Patent ID: 11959138
Assignee: ILLUMINA CAMBRIDGE LIMITED
Field: Organic fine chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 4:
5. The kit of claim 4, wherein the first photochromic moiety comprises a structure of formula (I):, wherein:
X is O (oxygen) or S (sulfur);
each of R1a and R2a is independently selected from the group consisting of H, halo, optionally substituted C1-6 alkyl, optionally substituted C2-6 alkenyl, optionally substituted C2-6 alkynyl, C1-6 haloalkyl, C1-6 alkoxy, and C1-6 haloalkoxy;
R3 is selected from the group consisting of H, C1-6 alkyl, and —(CH2)n-R4, R4 is selected from the group consisting of C6-10 aryl, 5 to 10 membered heteroaryl, 3 to 7 membered carbocyclyl, and 3 to 7 membered heterocyclyl, each optionally substituted;
ring A is C6-10 aryl or 5 to 10 membered heteroaryl, each substituted with at least one electron withdrawing group; and
n is an integer of 1 to 6.