(1S,4R)-4,7,7-Trimethyl-3-oxo-2-oxa-bicyclo[2.2.1]heptane-1-carboxylic acid (4bS,8aS,9S)-7-[1-ethoxycarbonyl-meth-(E)-ylidene]-2-methoxy-4b,5,6,7,8,8a,9,10-octahydro-phenanthren-9-yl ester is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.
The CAS Registry Mumber 138403-93-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,4,0 and 3 respectively; the second part has 2 digits, 9 and 3 respectively. Calculate Digit Verification of CAS Registry Number 138403-93: (8*1)+(7*3)+(6*8)+(5*4)+(4*0)+(3*3)+(2*9)+(1*3)=127 127 % 10 = 7 So 138403-93-7 is a valid CAS Registry Number.
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