<SubstanceDefinition xmlns="http://hl7.org/fhir"><id value="peg3350"/><identifier><system value="http://example.europa.eu/fhir/SMSId"/><value value="PEG3350P"/></identifier><status><coding><system value="http://hl7.org/fhir/publication-status"/><code value="active"/><display value="Active"/></coding></status><classification><coding><system value="http://example.europa.eu/fhir/SubstanceType"/><code value="polymer"/><display value="Polymer"/></coding></classification><domain><coding><system value="http://example.europa.eu/fhir/Domain"/><code value="human"/><display value="Human use"/></coding></domain><description value="Polyethylene Glycol 3350 (PEG 3350, Macrogol 3350) — a synthetic polyether of ethylene oxide with number-average molecular weight approximately 3350 Da. Linear homopolymer used as an osmotic laxative and a pharmaceutical excipient."/><code><code><coding><system value="http://example.europa.eu/fhir/Substance"/><code value="PEG3350P"/></coding></code></code><name><name value="Polyethylene Glycol 3350"/><preferred value="true"/><language><coding><system value="urn:ietf:bcp:47"/><code value="en"/><display value="English"/></coding></language><official><authority><coding><system value="http://hl7.org/fhir/substance-name-authority"/><code value="USAN"/><display value="USAN"/></coding></authority><status><coding><system value="http://hl7.org/fhir/publication-status"/><code value="active"/><display value="Active"/></coding></status></official></name><name><name value="Macrogol 3350"/><preferred value="false"/></name><molecularWeight><type><coding><system value="http://example.europa.eu/fhir/WeightType"/><code value="number-average"/><display value="Number average (Mn)"/></coding></type><amount><value value="3350"/><unit value="g/mol"/><system value="http://unitsofmeasure.org"/><code value="g/mol"/></amount></molecularWeight><polymer><class><coding><system value="http://hl7.org/fhir/polymer-class"/><code value="homopolymer"/><display value="Homopolymer"/></coding></class><geometry><coding><system value="http://hl7.org/fhir/polymer-geometry"/><code value="linear"/><display value="Linear"/></coding></geometry><monomerSet><ratioType><coding><system value="http://hl7.org/fhir/polymer-monomer-ratio-type"/><code value="monomer-polymer-ratio"/><display value="Monomer/Polymer ratio"/></coding></ratioType><startingMaterial><code><concept><coding><system value="http://example.europa.eu/fhir/Substance"/><code value="ethylene-oxide"/><display value="Ethylene oxide"/></coding></concept></code><category><coding><system value="http://hl7.org/fhir/polymer-starting-material-category"/><code value="chemical-substance"/><display value="Chemical substance"/></coding></category><isDefining value="true"/><amount><value value="76"/><unit value="monomers per polymer"/></amount></startingMaterial></monomerSet><repeat><averageMolecularFormula value="(C2H4O)76"/><repeatUnitAmountType><coding><system value="http://hl7.org/fhir/polymer-monomer-ratio-type"/><code value="sru-polymer-ratio"/><display value="SRU/Polymer ratio"/></coding></repeatUnitAmountType><repeatUnit><unit value="-CH2-CH2-O-"/><orientation><coding><system value="http://hl7.org/fhir/polymerisation-orientation"/><code value="head-tail"/><display value="Head-to-tail"/></coding></orientation><amount value="76"/><degreeOfPolymerisation><type><coding><system value="http://hl7.org/fhir/degree-of-polymerisation-type"/><code value="number-average"/><display value="Number average"/></coding></type><average value="76"/><low value="70"/><high value="82"/></degreeOfPolymerisation></repeatUnit></repeat></polymer></SubstanceDefinition>