k-Strophanthin, its cas register number is 11005-63-3. It also can be called Strophanthin K; Kombe-strophanthin; and Strophanthin. k-Strophanthidin is a cardenolide found in species of the genus Strophanthus. It is the aglycone of k-strophanthin, an analogue of ouabain. k-strophanthin is found in the ripe seeds of Strophanthus kombé and in the lily Convallaria. It is white or yellowish powder contg as much as 10% water, which it does not lose entirely without decompn.

Physical properties about k-Strophanthin are: (1)ACD/LogP: -1.83; (2)# of Rule of 5 Violations: 3; (3)ACD/LogD (pH 5.5): -1.83; (4)ACD/LogD (pH 7.4): -1.83; (5)ACD/BCF (pH 5.5): 1.00; (6)ACD/BCF (pH 7.4): 1.00; (7)ACD/KOC (pH 5.5): 2.41; (8)ACD/KOC (pH 7.4): 2.41; (9)#H bond acceptors: 14; (10)#H bond donors: 6; (11)#Freely Rotating Bonds: 14; (12)Index of Refraction: 1.613; (13)Molar Refractivity: 174 cm³; (14)Molar Volume: 499.491 cm³; (15)Polarizability: 68.979 10-24cm³; (16)Surface Tension: 70.3649978637695 dyne/cm; (17)Density: 1.423 g/cm³; (18)Flash Point: 270.106 °C ; (19)Enthalpy of Vaporization: 144.813 kJ/mol; (20)Boiling Point: 877.07 °C at 760 mmHg

You can still convert the following datas into molecular structure:
(1)InChI=1S/C37H56O13/c1-19-33(50-26-12-20(16-38)30(41)32(43)31(26)42)27(46-3)14-29(48-19)49-22-4-9-35(18-39)24-5-8-34(2)23(21-13-28(40)47-17-21)7-11-37(34,45)25(24)6-10-36(35,44)15-22/h13,18-20,22-27,29-33,38,41-45H,4-12,14-17H2,1-3H3/t19-,20+,22?,23?,24?,25?,26+,27-,29+,30+,31-,32-,33?,34?,35?,36?,37-/m1/s1;
(2)InChIKey=ICLVTBHPYDRXBN-MAXQWQMNSA-N;
(3)SmilesC1[C@H]([C@@H]([C@H]([C@@H](O)[C@H]1O[C@@H]1[C@H](O[C@H](C[C@H]1OC)O[C@@H]1CC[C@@]2(C=O)[C@@](O)(C1)CC[C@@H]1[C@@H]2CC[C@@]2([C@@]1(CC[C@@H]2C=1COC(C1)=O)O)C)C)O)O)CO;

The toxicity data of k-Strophanthin is as follows: