The IUPAC name of Ethyltris(dimethylsiloxy)silane is [Bis[(dimethyl-λ³-silanyl)oxy]-ethylsilyl]oxy-dimethylsilicon. With the CAS registry number 150320-87-9, it is also named as 3-[(Dimethylsilyl)oxy]-3-ethyl-1,1,5,5-tetramethyl-trisiloxane. In addition, its molecular formula is C₈H₂₆O₃Si₄ and its molecular weight is 282.63. 

The other characteristics of Ethyltris(dimethylsiloxy)silane can be summarized as: (1)ACD/LogP: 8.46; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 9; (4)ACD/LogD (pH 7.4): 9; (5)ACD/BCF (pH 5.5): 1000000; (6)ACD/BCF (pH 7.4): 1000000; (7)ACD/KOC (pH 5.5): 1467240; (8)ACD/KOC (pH 7.4): 1467240; (9)H bond acceptors: 3; (10)H bond donors: 0; (11)Rotatable Bond Count: 7; (12)Exact Mass: 279.072426; (13)MonoIsotopic Mass: 279.072426; (14)Heavy Atom Count: 15; (15)Complexity: 149; (16)Freely Rotating Bonds: 7; (17)Polar Surface Area: 27.69 Å²; (18)Flash Point: 80.035 °C; (19)Enthalpy of Vaporization: 42.683 kJ/mol; (20)Boiling Point: 208.726 °C at 760 mmHg; (21)Vapour Pressure: 0.304 mmHg at 25 °C.

People can use the following data to convert to the molecule structure.
(1)SMILES:C[SiH](C)O[Si](O[SiH](C)C)(O[SiH](C)C)CC
(2)InChI:InChI=1/C8H26O3Si4/c1-8-15(9-12(2)3,10-13(4)5)11-14(6)7/h12-14H,8H2,1-7H3
(3)InChIKey:AUOXZXJFAIJLLR-UHFFFAOYAA
(4)Std. InChI:InChI=1S/C8H26O3Si4/c1-8-15(9-12(2)3,10-13(4)5)11-14(6)7/h12-14H,8H2,1-7H3
(5)Std. InChIKey:AUOXZXJFAIJLLR-UHFFFAOYSA-N