ICI-164384

ICI-164384
Identifiers

IUPAC name N-Butyl-11-[(7R,8R,9S,13S,14S,17S)-3,17-dihydroxy-13-methyl-6,7,8,9,11,12,14,15,16,17-decahydrocyclopenta[a]phenanthren-7-yl]-N-methylundecanamide
Synonyms	N-n-Butyl-N-methyl-11-(3,17β-dihydroxyestra-1,3,5(10)-trien-7α-yl)undecanamide
CAS Number	98007-99-9
PubChem CID	104772
ChemSpider	94580
UNII	84LT43726C
KEGG	C14758
ChEMBL	CHEMBL1222035
Chemical and physical data
Formula	C₃₄H₅₅NO₃
Molar mass	525.818 g/mol
3D model (Jmol)	Interactive image
SMILES CCCCN(C)C(=O)CCCCCCCCCC[C@@H]1CC2=C(C=CC(=C2)O)[C@@H]3[C@@H]1[C@@H]4CC[C@@H]([C@]4(CC3)C)O
InChI InChI=1S/C34H55NO3/c1-4-5-22-35(3)32(38)15-13-11-9-7-6-8-10-12-14-25-23-26-24-27(36)16-17-28(26)29-20-21-34(2)30(33(25)29)18-19-31(34)37/h16-17,24-25,29-31,33,36-37H,4-15,18-23H2,1-3H3/t25-,29-,30+,31+,33-,34+/m1/s1 Key:BVVFOLSZMQVDKV-KXQIQQEYSA-N

ICI-164384, also known as N-n-butyl-N-methyl-11-(3,17β-dihydroxyestra-1,3,5(10)-trien-7α-yl)undecanamide, is a steroidal antiestrogen and a synthetic derivative of estradiol which is closely related to fulvestrant and was never marketed. It is a silent antagonist of the estrogen receptor (ER) with no intrinsic estrogenic activity and hence is a pure antiestrogen, unlike selective estrogen receptor modulators (SERMs) like tamoxifen. The drug was under development by AstraZeneca for the treatment of breast cancer but was discontinued in favor of fulvestrant, which is very similar to ICI-164384 but is more potent in comparison.