Abstract: Examples pertaining to preamble puncturing negotiation in wireless communications are described. A station (STA) may receive a control frame, and, in response, apply the MRU pattern for one or more transmissions or receptions in a transmission opportunity (TXOP). In the control frame, either a plurality of first reserved bits in a SERVICE field or a plurality of bits in a User Info field are set to indicate a multiple resource unit (MRU) pattern regarding preamble puncturing.

Abstract: A method for preparing an Antrodia cinnamomea extract, comprising: using an ethanol solution to extract culture dish-type Antrodia cinnamomea sporocarp powder, concentrating a filtrate under reduced pressure to obtain a crude extract; adsorbing the crude extract by using a macroporous resin and then placing same in a rectangular container; sequentially eluting by using a mixed solution, concentrating an eluate under reduced pressure, and drying to obtain a first sub-extract of an Antrodia cinnamomea extract; next, eluting by using an ethanol solution, concentrating an eluate under reduced pressure, and drying to obtain a second sub-extract of the Antrodia cinnamomea extract; next, eluting by using an ethyl acetate solution, concentrating an eluate under reduced pressure, and drying to obtain a third sub-extract of the Antrodia cinnamomea extract. The obtained sub-extracts of an Antrodia cinnamomea extract may be used for treating cancer and reducing the side effects of chemotherapy.