ortataxel ortataxel ortataxel is a drug used in chemotherapy. as of june 2009, spectrum pharmaceuticals has the drug in a phase 2 clinical trial. ortataxelclinical dataatc codenoneidentifiers iupac name (3as,4r,7r,8as,9s,10ar,12as,13s,13as)-7,12a-bis(acetyloxy)-4-(oxy)-9-hydroxy-5,8a,14,14-tetramethyl-2,8-dioxo-3a,4,7,8,8a,9,10,10a,12,12a,12b,13-dodecahydro-6,13a-methanodioxolocyclodecabenzoxet-13-yl benzoate cas number186348-23-2 ypubchem cid10557575chemspider5293609unii8h61y4e29necha infocard100.158.836 chemical and physical dataformulac44h57no17molar mass871.930 g·mol−13d model (jsmol)interactive image smiles cc1=c2(c(=o)3((c4(3(5(c2(c)c)(1oc(=o)((cc(c)c)nc(=o)oc(c)(c)c)o)oc(=o)o5)oc(=o)c6=cc=cc=c6)(co4)oc(=o)c)o)c)oc(=o)c inchi inchi=1s/c44h57no17/c1-20(2)17-25(45-38(53)61-40(6,7)8)29(49)37(52)57-30-21(3)28-31(56-22(4)46)33(50)42(11)26(48)18-27-43(19-55-27,60-23(5)47)32(42)35(58-36(51)24-15-13-12-14-16-24)44(41(28,9)10)34(30)59-39(54)62-44/h12-16,20,25-27,29-32,34-35,48-49h,17-19h2,1-11h3,(h,45,53)/t25-,26-,27+,29+,30+,31+,32-,34-,35-,42+,43-,44+/m0/s1key:bwkdambgcprvpi-zqrphvbesa-n (verify)