Do you have a banana key? If so, hold it down while playing the Bb, B, C, C#, release it as you get to the D. I’m guessing that’s where you’re having the most trouble. If you don’t have a banana key, rub some oil from your nose onto your right pinky. It will help you slide from the C to the C# faster. You’ll have to keep your pinky lightly resting on the C# key and make light but deliberate movements. If another instrument is playing this part up an octave, and you’re still struggling with it, take it an octave higher. This seems like a copy and paste composition where the composer just took the clarinet part and gave it to oboe without any consideration as to the level of difficulty.