The 4-Methoxybenzyl 3,3-dimethyl-7-oxo-6-[(phenylacetyl)amino]-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 4-oxide , with the CAS register no 30034-13-0, has the systematic name of (4-methoxyphenyl)methyl 3,3-dimethyl-4,7-dioxo-6-[(2-phenylacetyl)amino]-4$l^{4}-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate . And it is also known to us as lk-penicillin in penicilling the derivatives ; geo : penicillin-g-p-methoxybenzyl ester sulfoxide ; penicillin g sulfoxide p-methoxybenzyl ester .

The physical properties of this chemical are as the following: (1)#H bond acceptors:  8 ; (2) #H bond donors:  1  ; (3)#Freely Rotating Bonds:  8  ; (4)Polar Surface Area:  121.22   ; (5)Index of Refraction:  1.652  ; (6)Molar Refractivity:  123.12 cm³  ; (7)Molar Volume:  336.7 cm³  ; (8)Polarizability:  48.8 ×10^-24 cm³  ; (9)Surface Tension:  69.3 dyne/cm  ; (10)Density:  1.39 g/cm³  ; (11)Flash Point:  416.8 °C  ; (12)Enthalpy of Vaporization:  111.47 kJ/mol  ; (13)Boiling Point:  765.5 °C at 760 mmHg  ; (14)Vapour Pressure:  2.42E-23 mmHg at 25°C.

This kind of chemical is widely used in the pharmaceutics and medicine. And as to the market information, there are many supplier in China, such as TAIYUAN RHF CO.,LTD. 

In addition, you could obtain the molecular structure by converting the following data information:
SMILES:CC1(C(N2C(S1=O)C(C2=O)NC(=O)Cc3ccccc3)C(=O)OCc4ccc(cc4)OC)C
InChI:InChI=1/C24H26N2O6S/c1-24(2)20(23(29)32-14-16-9-11-17(31-3)12-10-16)26-21(28)19(22(26)33(24)30)25-18(27)13-15-7-5-4-6-8-15/h4-12,19-20,22H,13-14H2,1-3H3,(H,25,27)
InChIKey:HSSBYPUKMZQQKS-UHFFFAOYAJ