The monoisotopic mass is the sum of the masses of the atoms in a molecule using the unbound, ground-state, rest mass of the principal (most abundant) isotope for each element instead of the isotopic average mass. Please include the units in the form '<Number> <unit>', for example '770.230488 g/mol' or as '<QuantitativeValue>.

This is the molecular weight of the entity being described, not of the parent. Units should be included in the form '<Number> <unit>', for example '12 amu' or as '<QuantitativeValue>.

The empirical formula is the simplest whole number ratio of all the atoms in a molecule.

Systematic method of naming chemical compounds as recommended by the International Union of Pure and Applied Chemistry (IUPAC).

InChIKey is a hashed version of the full InChI (using the SHA-256 algorithm).

Non-proprietary identifier for molecular entity that can be used in printed and electronic data sources thus enabling easier linking of diverse data compilations.

Amount of shipping costs for product returns (for any reason). Applicable when property [returnFees](https://schema.org/returnFees) equals [ReturnShippingFees](https://schema.org/ReturnShippingFees).

Seasonal override of a return policy.

The country where the product has to be sent to for returns, for example "Ireland" using the [name](https://schema.org/name) property of [Country](https://schema.org/Country). You can also provide the two-letter [ISO 3166-1 alpha-2 country code](http://en.wikipedia.org/wiki/ISO_3166-1). Note that this can be different from the country where the product was originally shipped from or sent to.

The type of return method offered, specified from an enumeration.

The method (from an enumeration) by which the customer obtains a return shipping label for a product returned for any reason.

Use [MonetaryAmount](https://schema.org/MonetaryAmount) to specify a fixed restocking fee for product returns, or use [Number](https://schema.org/Number) to specify a percentage of the product price paid by the customer.

Amount of shipping costs for defect product returns. Applicable when property [itemDefectReturnFees](https://schema.org/itemDefectReturnFees) equals [ReturnShippingFees](https://schema.org/ReturnShippingFees).

The method (from an enumeration) by which the customer obtains a return shipping label for a defect product.

The type of return fees for returns of defect products.

The amount of shipping costs if a product is returned due to customer remorse. Applicable when property [customerRemorseReturnFees](https://schema.org/customerRemorseReturnFees) equals [ReturnShippingFees](https://schema.org/ReturnShippingFees).

The method (from an enumeration) by which the customer obtains a return shipping label for a product returned due to customer remorse.

The type of return fees if the product is returned due to customer remorse.

In the context of a [MediaReview](https://schema.org/MediaReview), indicates specific media item(s) that are grouped using a [MediaReviewItem](https://schema.org/MediaReviewItem).

Link to the page containing an original version of the content, or directly to an online copy of the original [MediaObject](https://schema.org/MediaObject) content, e.g. video file.

Describes, in a [MediaReview](https://schema.org/MediaReview) when dealing with [DecontextualizedContent](https://schema.org/DecontextualizedContent), background information that can contribute to better interpretation of the [MediaObject](https://schema.org/MediaObject).

Indicates whether an [url](https://schema.org/url) that is associated with a [JobPosting](https://schema.org/JobPosting) enables direct application for the job, via the posting website. A job posting is considered to have directApply of [True](https://schema.org/True) if an application process for the specified job can be directly initiated via the url(s) given (noting that e.g. multiple internet domains might nevertheless be involved at an implementation level). A value of [False](https://schema.org/False) is appropriate if there is no clear path to applying directly online for the specified job, navigating directly from the JobPosting url(s) supplied.

A symbolic representation of a BioChemEntity. For example, a nucleotide sequence of a Gene or an amino acid sequence of a Protein.

Tissue, organ, biological sample, etc in which activity of this gene has been observed experimentally. For example brain, digestive system.