Anti-cancer nuclear hormone receptor-targeting compounds

1. A compound of Formula IIIA or IIIB, or a stereoisomer, mixture of stereoisomers, or pharmaceutically acceptable salt thereof:

wherein:

L 1 is a covalent bond, optionally substituted alkylene or optionally substituted heteroalkylene; and

R 16 is a nuclear receptor-targeting epitope,

wherein R 16 is selected from the group consisting of:

where the wavy line indicates the point of attachment to L 1 .

2. The compound of claim 1 , or a stereoisomer, mixture of stereoisomers, or pharmaceutically acceptable salt thereof, wherein L 1 is of the formula:

—Y 1 —(CH 2 ) n —Y 2 —(CH 2 ) p —Y 3 —

wherein each of Y 1 , Y 2 , and Y 3 are independently a bond, —CR 11 R 12 —, —NR 11 —, —O—, —S(O) 0-2 —, —NR 11 C(O)—, —C(O)NR 11 —, —NR 11 S(O) 2 —, —S(O) 2 NR 11 —, —CR 12 ═N—NR 11 —, —NR 11 —N═CR 12 —, or —C(O)—;

each R 11 is independently hydrogen, C 1-4 alkyl, C 1-4 haloalkyl, aryl, heteroaryl, cycloalkyl or heterocyclyl;

each R 12 is independently hydrogen, C 1-4 alkyl, C 1-4 haloalkyl, aryl, heteroaryl, cycloalkyl or heterocyclyl; and

n and p are each independently 0, 1, 2, 3, 4, 5, 6, 7, or 8.

3. The compound of claim 1 , or a stereoisomer, mixture of stereoisomers, or pharmaceutically acceptable salt thereof, wherein the nuclear receptor-targeting epitope binds to a nuclear steroid receptor with an IC 50 of less than about 500 nM or an EC 50 of less than about 1 μM.

4. The compound of claim 1 , wherein the compound is selected from the group consisting of:

or a pharmaceutically acceptable salt thereof.

5. A pharmaceutical composition comprising a compound of claim 1 , or a stereoisomer, mixture of stereoisomers, or pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable excipient.

6. A method of treating cancer, comprising administering an effective amount of the pharmaceutical composition of claim 5 to an individual in need thereof, wherein the cancer is a blood cancer, lung cancer, breast cancer, fallopian tube cancer, brain cancer, head and neck cancer, esophageal cancer, ovarian cancer, pancreatic cancer, peritoneal cancer, prostate cancer or skin cancer.

7. A method of treating cancer, comprising administering an effective amount of the pharmaceutical composition of claim 5 to an individual in need thereof, wherein the cancer is liver cancer, melanoma, Hodgkin's disease, non-Hodgkin's lymphomas, acute lymphocytic leukemia, chronic lymphocytic leukemia, multiple myeloma, neuroblastoma, breast carcinoma, ovarian carcinoma, lung carcinoma, Wilms' tumor, cervical carcinoma, testicular carcinoma, soft-tissue sarcoma, chronic lymphocytic leukemia, primary macroglobulinemia, bladder carcinoma, chronic granulocytic leukemia, primary brain carcinoma, malignant melanoma, small-cell lung carcinoma, stomach carcinoma, colon carcinoma, malignant pancreatic insulinoma, malignant carcinoid carcinoma, malignant melanoma, choriocarcinoma, mycosis fungoides, head neck carcinoma, osteogenic sarcoma, pancreatic carcinoma, acute granulocytic leukemia, hairy cell leukemia, rhabdomyosarcoma, Kaposi's sarcoma, genitourinary carcinoma, thyroid carcinoma, esophageal carcinoma, malignant hypercalcemia, cervical hyperplasia, renal cell carcinoma, endometrial carcinoma, polycythemia vera, essential thrombocytosis, adrenal cortex carcinoma, skin cancer, or prostatic carcinoma.

8. A method of treating cancer, comprising administering an effective amount of the pharmaceutical composition of claim 5 to an individual in need thereof, wherein the cancer is bladder cancer, breast carcinoma, fallopian tube cancer, ovarian cancer, prostate cancer, peritoneal cancer, testicular cancer, endometrial cancer, or uterine cancer.